diff --git a/change/@react-native-windows-automation-channel-c72c39e3-c579-4b51-b2aa-6fc7302f6bc4.json b/change/@react-native-windows-automation-channel-c72c39e3-c579-4b51-b2aa-6fc7302f6bc4.json
new file mode 100644
index 00000000000..2a5071f1302
--- /dev/null
+++ b/change/@react-native-windows-automation-channel-c72c39e3-c579-4b51-b2aa-6fc7302f6bc4.json
@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Upgrade to Boost 1.84",
+  "packageName": "@react-native-windows/automation-channel",
+  "email": "julio.rocha@microsoft.com",
+  "dependentChangeType": "patch"
+}
diff --git a/change/react-native-windows-578517aa-d3ba-4901-a4f1-78366e66ee48.json b/change/react-native-windows-578517aa-d3ba-4901-a4f1-78366e66ee48.json
new file mode 100644
index 00000000000..dc679931a1d
--- /dev/null
+++ b/change/react-native-windows-578517aa-d3ba-4901-a4f1-78366e66ee48.json
@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Upgrade to Boost 1.84",
+  "packageName": "react-native-windows",
+  "email": "julio.rocha@microsoft.com",
+  "dependentChangeType": "patch"
+}
diff --git a/packages/@react-native-windows/automation-channel/windows/AutomationChannel/packages.lock.json b/packages/@react-native-windows/automation-channel/windows/AutomationChannel/packages.lock.json
index 416ddc61c13..629ac432f62 100644
--- a/packages/@react-native-windows/automation-channel/windows/AutomationChannel/packages.lock.json
+++ b/packages/@react-native-windows/automation-channel/windows/AutomationChannel/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.VCRTForwarders.140": {
         "type": "Direct",
@@ -158,13 +158,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -176,14 +176,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/packages/@rnw-scripts/prepare-release/bin.js b/packages/@rnw-scripts/prepare-release/bin.js
old mode 100644
new mode 100755
diff --git a/packages/@rnw-scripts/unbroken/bin.js b/packages/@rnw-scripts/unbroken/bin.js
old mode 100644
new mode 100755
diff --git a/packages/e2e-test-app-fabric/windows/RNTesterApp-Fabric.Package/packages.lock.json b/packages/e2e-test-app-fabric/windows/RNTesterApp-Fabric.Package/packages.lock.json
index 075833b35b8..60c43bee483 100644
--- a/packages/e2e-test-app-fabric/windows/RNTesterApp-Fabric.Package/packages.lock.json
+++ b/packages/e2e-test-app-fabric/windows/RNTesterApp-Fabric.Package/packages.lock.json
@@ -4,8 +4,8 @@
     "UAP,Version=v10.0.17763": {
       "boost": {
         "type": "Transitive",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.Build.Tasks.Git": {
         "type": "Transitive",
@@ -152,19 +152,19 @@
           "Microsoft.ReactNative": "[1.0.0, )",
           "Microsoft.VCRTForwarders.140": "[1.0.2-rc, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -176,14 +176,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "rntesterapp-fabric": {
@@ -195,7 +195,7 @@
           "Microsoft.VCRTForwarders.140": "[1.0.2-rc, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "SampleCustomComponent": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "samplecustomcomponent": {
@@ -204,7 +204,7 @@
           "Microsoft.ReactNative": "[1.0.0, )",
           "Microsoft.VCRTForwarders.140": "[1.0.2-rc, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/packages/e2e-test-app-fabric/windows/RNTesterApp-Fabric/packages.lock.json b/packages/e2e-test-app-fabric/windows/RNTesterApp-Fabric/packages.lock.json
index d00703ee445..0f821d61026 100644
--- a/packages/e2e-test-app-fabric/windows/RNTesterApp-Fabric/packages.lock.json
+++ b/packages/e2e-test-app-fabric/windows/RNTesterApp-Fabric/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.JavaScript.Hermes": {
         "type": "Direct",
@@ -162,19 +162,19 @@
           "Microsoft.ReactNative": "[1.0.0, )",
           "Microsoft.VCRTForwarders.140": "[1.0.2-rc, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -186,14 +186,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "samplecustomcomponent": {
@@ -202,7 +202,7 @@
           "Microsoft.ReactNative": "[1.0.0, )",
           "Microsoft.VCRTForwarders.140": "[1.0.2-rc, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/packages/playground/windows/playground-composition.Package/packages.experimentalwinui3.lock.json b/packages/playground/windows/playground-composition.Package/packages.experimentalwinui3.lock.json
index 45075a916a8..6f721bf7a8a 100644
--- a/packages/playground/windows/playground-composition.Package/packages.experimentalwinui3.lock.json
+++ b/packages/playground/windows/playground-composition.Package/packages.experimentalwinui3.lock.json
@@ -4,8 +4,8 @@
     "UAP,Version=v10.0.17763": {
       "boost": {
         "type": "Transitive",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.Build.Tasks.Git": {
         "type": "Transitive",
@@ -149,13 +149,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -167,7 +167,7 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[2.0.0-experimental3, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "playground-composition": {
@@ -178,14 +178,14 @@
           "Microsoft.VCRTForwarders.140": "[1.0.2-rc, )",
           "Microsoft.WindowsAppSDK": "[2.0.0-experimental3, )",
           "SampleCustomComponent": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "samplecustomcomponent": {
@@ -194,7 +194,7 @@
           "Microsoft.ReactNative": "[1.0.0, )",
           "Microsoft.VCRTForwarders.140": "[1.0.2-rc, )",
           "Microsoft.WindowsAppSDK": "[2.0.0-experimental3, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/packages/playground/windows/playground-composition.Package/packages.lock.json b/packages/playground/windows/playground-composition.Package/packages.lock.json
index 91df468bfed..c2cef9fea98 100644
--- a/packages/playground/windows/playground-composition.Package/packages.lock.json
+++ b/packages/playground/windows/playground-composition.Package/packages.lock.json
@@ -4,8 +4,8 @@
     "UAP,Version=v10.0.17763": {
       "boost": {
         "type": "Transitive",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.Build.Tasks.Git": {
         "type": "Transitive",
@@ -149,13 +149,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -167,7 +167,7 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "playground-composition": {
@@ -178,14 +178,14 @@
           "Microsoft.VCRTForwarders.140": "[1.0.2-rc, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "SampleCustomComponent": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "samplecustomcomponent": {
@@ -194,7 +194,7 @@
           "Microsoft.ReactNative": "[1.0.0, )",
           "Microsoft.VCRTForwarders.140": "[1.0.2-rc, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/packages/playground/windows/playground-composition/packages.experimentalwinui3.lock.json b/packages/playground/windows/playground-composition/packages.experimentalwinui3.lock.json
index 032fbabc142..b4923dc9447 100644
--- a/packages/playground/windows/playground-composition/packages.experimentalwinui3.lock.json
+++ b/packages/playground/windows/playground-composition/packages.experimentalwinui3.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.JavaScript.Hermes": {
         "type": "Direct",
@@ -159,13 +159,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -177,14 +177,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[2.0.0-experimental3, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "samplecustomcomponent": {
@@ -193,7 +193,7 @@
           "Microsoft.ReactNative": "[1.0.0, )",
           "Microsoft.VCRTForwarders.140": "[1.0.2-rc, )",
           "Microsoft.WindowsAppSDK": "[2.0.0-experimental3, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     }
diff --git a/packages/playground/windows/playground-composition/packages.lock.json b/packages/playground/windows/playground-composition/packages.lock.json
index cfb7b000da5..b1f604a694c 100644
--- a/packages/playground/windows/playground-composition/packages.lock.json
+++ b/packages/playground/windows/playground-composition/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.JavaScript.Hermes": {
         "type": "Direct",
@@ -159,13 +159,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -177,14 +177,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "samplecustomcomponent": {
@@ -193,7 +193,7 @@
           "Microsoft.ReactNative": "[1.0.0, )",
           "Microsoft.VCRTForwarders.140": "[1.0.2-rc, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     }
diff --git a/packages/sample-app-fabric/windows/SampleAppFabric.Package/packages.lock.json b/packages/sample-app-fabric/windows/SampleAppFabric.Package/packages.lock.json
index 5494e423d71..affc68baa46 100644
--- a/packages/sample-app-fabric/windows/SampleAppFabric.Package/packages.lock.json
+++ b/packages/sample-app-fabric/windows/SampleAppFabric.Package/packages.lock.json
@@ -4,8 +4,8 @@
     "UAP,Version=v10.0.17763": {
       "boost": {
         "type": "Transitive",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.Build.Tasks.Git": {
         "type": "Transitive",
@@ -149,13 +149,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -167,14 +167,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "sampleappfabric": {
@@ -184,7 +184,7 @@
           "Microsoft.ReactNative": "[1.0.0, )",
           "Microsoft.VCRTForwarders.140": "[1.0.2-rc, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/packages/sample-app-fabric/windows/SampleAppFabric/packages.lock.json b/packages/sample-app-fabric/windows/SampleAppFabric/packages.lock.json
index 99010cf4fde..73d1d955370 100644
--- a/packages/sample-app-fabric/windows/SampleAppFabric/packages.lock.json
+++ b/packages/sample-app-fabric/windows/SampleAppFabric/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
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-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.JavaScript.Hermes": {
         "type": "Direct",
@@ -159,13 +159,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -177,14 +177,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/packages/sample-custom-component/windows/SampleCustomComponent/packages.experimentalwinui3.lock.json b/packages/sample-custom-component/windows/SampleCustomComponent/packages.experimentalwinui3.lock.json
index 53ba49caa6e..eff4be7784b 100644
--- a/packages/sample-custom-component/windows/SampleCustomComponent/packages.experimentalwinui3.lock.json
+++ b/packages/sample-custom-component/windows/SampleCustomComponent/packages.experimentalwinui3.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.VCRTForwarders.140": {
         "type": "Direct",
@@ -158,13 +158,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -176,14 +176,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[2.0.0-experimental3, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     }
diff --git a/packages/sample-custom-component/windows/SampleCustomComponent/packages.lock.json b/packages/sample-custom-component/windows/SampleCustomComponent/packages.lock.json
index 71108af7e28..ca3fc07c2bc 100644
--- a/packages/sample-custom-component/windows/SampleCustomComponent/packages.lock.json
+++ b/packages/sample-custom-component/windows/SampleCustomComponent/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.VCRTForwarders.140": {
         "type": "Direct",
@@ -158,13 +158,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -176,14 +176,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     }
diff --git a/vnext/Common/Common.vcxproj b/vnext/Common/Common.vcxproj
index 6432d559e36..290ca9d377f 100644
--- a/vnext/Common/Common.vcxproj
+++ b/vnext/Common/Common.vcxproj
@@ -94,7 +94,7 @@
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ItemGroup>
-    <PackageReference Include="boost" Version="1.83.0.0" />
+    <PackageReference Include="boost" Version="1.84.0.0" />
     <PackageReference Include="Microsoft.Windows.CppWinRT" Version="$(CppWinRTVersion)" PrivateAssets="all" />
   </ItemGroup>
   <ImportGroup Label="ExtensionTargets">
diff --git a/vnext/Common/packages.lock.json b/vnext/Common/packages.lock.json
index 97da0e9ad59..7cfe05b6c48 100644
--- a/vnext/Common/packages.lock.json
+++ b/vnext/Common/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.Windows.CppWinRT": {
         "type": "Direct",
diff --git a/vnext/Desktop.ABITests/packages.experimentalwinui3.lock.json b/vnext/Desktop.ABITests/packages.experimentalwinui3.lock.json
index 89804ddd650..4d3f1d4ade0 100644
--- a/vnext/Desktop.ABITests/packages.experimentalwinui3.lock.json
+++ b/vnext/Desktop.ABITests/packages.experimentalwinui3.lock.json
@@ -16,8 +16,8 @@
       },
       "boost": {
         "type": "Transitive",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.Build.Tasks.Git": {
         "type": "Transitive",
@@ -161,13 +161,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "follywin32": {
@@ -187,7 +187,7 @@
           "Microsoft.WindowsAppSDK": "[2.0.0-experimental3, )",
           "ReactCommon": "[1.0.0, )",
           "ReactNative.V8Jsi.Windows": "[0.71.8, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "react.windows.desktop.dll": {
@@ -197,14 +197,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "React.Windows.Desktop": "[1.0.0, )",
           "ReactNative.V8Jsi.Windows": "[0.71.8, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/vnext/Desktop.ABITests/packages.lock.json b/vnext/Desktop.ABITests/packages.lock.json
index ee75794c701..182b25a5096 100644
--- a/vnext/Desktop.ABITests/packages.lock.json
+++ b/vnext/Desktop.ABITests/packages.lock.json
@@ -16,8 +16,8 @@
       },
       "boost": {
         "type": "Transitive",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.Build.Tasks.Git": {
         "type": "Transitive",
@@ -161,13 +161,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "follywin32": {
@@ -187,7 +187,7 @@
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
           "ReactNative.V8Jsi.Windows": "[0.71.8, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "react.windows.desktop.dll": {
@@ -197,14 +197,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "React.Windows.Desktop": "[1.0.0, )",
           "ReactNative.V8Jsi.Windows": "[0.71.8, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/vnext/Desktop.DLL/React.Windows.Desktop.DLL.vcxproj b/vnext/Desktop.DLL/React.Windows.Desktop.DLL.vcxproj
index aadb98eff59..2cc3f9e5700 100644
--- a/vnext/Desktop.DLL/React.Windows.Desktop.DLL.vcxproj
+++ b/vnext/Desktop.DLL/React.Windows.Desktop.DLL.vcxproj
@@ -178,7 +178,7 @@
     </ResourceCompile>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="boost" Version="1.83.0.0" />
+    <PackageReference Include="boost" Version="1.84.0.0" />
     <PackageReference Include="Microsoft.JavaScript.Hermes" Version="$(HermesVersion)" />
     <PackageReference Include="$(V8PackageName)" Version="$(V8Version)" Condition="'$(UseV8)' == 'true'" />
   </ItemGroup>
diff --git a/vnext/Desktop.DLL/packages.experimentalwinui3.lock.json b/vnext/Desktop.DLL/packages.experimentalwinui3.lock.json
index 20c365aae12..835f368bacf 100644
--- a/vnext/Desktop.DLL/packages.experimentalwinui3.lock.json
+++ b/vnext/Desktop.DLL/packages.experimentalwinui3.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.JavaScript.Hermes": {
         "type": "Direct",
@@ -153,13 +153,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "follywin32": {
@@ -179,14 +179,14 @@
           "Microsoft.WindowsAppSDK": "[2.0.0-experimental3, )",
           "ReactCommon": "[1.0.0, )",
           "ReactNative.V8Jsi.Windows": "[0.71.8, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     }
diff --git a/vnext/Desktop.DLL/packages.lock.json b/vnext/Desktop.DLL/packages.lock.json
index 79bea0b6be6..e98b007231c 100644
--- a/vnext/Desktop.DLL/packages.lock.json
+++ b/vnext/Desktop.DLL/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.JavaScript.Hermes": {
         "type": "Direct",
@@ -153,13 +153,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "follywin32": {
@@ -179,14 +179,14 @@
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
           "ReactNative.V8Jsi.Windows": "[0.71.8, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     }
diff --git a/vnext/Desktop.IntegrationTests/React.Windows.Desktop.IntegrationTests.vcxproj b/vnext/Desktop.IntegrationTests/React.Windows.Desktop.IntegrationTests.vcxproj
index c7ca42dd01c..36ba1f247a7 100644
--- a/vnext/Desktop.IntegrationTests/React.Windows.Desktop.IntegrationTests.vcxproj
+++ b/vnext/Desktop.IntegrationTests/React.Windows.Desktop.IntegrationTests.vcxproj
@@ -141,7 +141,7 @@
     <ClInclude Include="WebSocketServer.h" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="boost" Version="1.83.0.0" />
+    <PackageReference Include="boost" Version="1.84.0.0" />
     <!-- TODO: Remove!!! -->
     <PackageReference Include="Microsoft.Windows.CppWinRT" Version="$(CppWinRTVersion)" PrivateAssets="all" />
     <PackageReference Include="$(V8PackageName)" Version="$(V8Version)" Condition="'$(UseV8)' == 'true'" />
diff --git a/vnext/Desktop.IntegrationTests/packages.experimentalwinui3.lock.json b/vnext/Desktop.IntegrationTests/packages.experimentalwinui3.lock.json
index 8f4e3d9b056..8dc90aa6678 100644
--- a/vnext/Desktop.IntegrationTests/packages.experimentalwinui3.lock.json
+++ b/vnext/Desktop.IntegrationTests/packages.experimentalwinui3.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.Windows.CppWinRT": {
         "type": "Direct",
@@ -157,13 +157,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "follywin32": {
@@ -183,7 +183,7 @@
           "Microsoft.WindowsAppSDK": "[2.0.0-experimental3, )",
           "ReactCommon": "[1.0.0, )",
           "ReactNative.V8Jsi.Windows": "[0.71.8, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "react.windows.desktop.dll": {
@@ -193,7 +193,7 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "React.Windows.Desktop": "[1.0.0, )",
           "ReactNative.V8Jsi.Windows": "[0.71.8, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "react.windows.integrationtests": {
@@ -201,14 +201,14 @@
         "dependencies": {
           "Common": "[1.0.0, )",
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     }
diff --git a/vnext/Desktop.IntegrationTests/packages.lock.json b/vnext/Desktop.IntegrationTests/packages.lock.json
index 575726f7f2b..9275c21fbb7 100644
--- a/vnext/Desktop.IntegrationTests/packages.lock.json
+++ b/vnext/Desktop.IntegrationTests/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.Windows.CppWinRT": {
         "type": "Direct",
@@ -157,13 +157,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "follywin32": {
@@ -183,7 +183,7 @@
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
           "ReactNative.V8Jsi.Windows": "[0.71.8, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "react.windows.desktop.dll": {
@@ -193,7 +193,7 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "React.Windows.Desktop": "[1.0.0, )",
           "ReactNative.V8Jsi.Windows": "[0.71.8, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "react.windows.integrationtests": {
@@ -201,14 +201,14 @@
         "dependencies": {
           "Common": "[1.0.0, )",
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     }
diff --git a/vnext/Desktop.UnitTests/React.Windows.Desktop.UnitTests.vcxproj b/vnext/Desktop.UnitTests/React.Windows.Desktop.UnitTests.vcxproj
index 1d1e90c2f79..83eb2840d0a 100644
--- a/vnext/Desktop.UnitTests/React.Windows.Desktop.UnitTests.vcxproj
+++ b/vnext/Desktop.UnitTests/React.Windows.Desktop.UnitTests.vcxproj
@@ -124,7 +124,7 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="boost" Version="1.83.0.0" />
+    <PackageReference Include="boost" Version="1.84.0.0" />
     <PackageReference Include="Microsoft.Windows.CppWinRT" Version="$(CppWinRTVersion)" PrivateAssets="all" />
   </ItemGroup>
   <!-- Remove the WinMD references we're picking up from Microsoft.WindowsAppSDK in the React.Windows.Desktop.vcxproj",
diff --git a/vnext/Desktop.UnitTests/packages.experimentalwinui3.lock.json b/vnext/Desktop.UnitTests/packages.experimentalwinui3.lock.json
index db131b28f53..469d1741897 100644
--- a/vnext/Desktop.UnitTests/packages.experimentalwinui3.lock.json
+++ b/vnext/Desktop.UnitTests/packages.experimentalwinui3.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.Windows.CppWinRT": {
         "type": "Direct",
@@ -156,13 +156,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "follywin32": {
@@ -182,14 +182,14 @@
           "Microsoft.WindowsAppSDK": "[2.0.0-experimental3, )",
           "ReactCommon": "[1.0.0, )",
           "ReactNative.V8Jsi.Windows": "[0.71.8, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     }
diff --git a/vnext/Desktop.UnitTests/packages.lock.json b/vnext/Desktop.UnitTests/packages.lock.json
index 229dbcbacce..36854f9cbcf 100644
--- a/vnext/Desktop.UnitTests/packages.lock.json
+++ b/vnext/Desktop.UnitTests/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.Windows.CppWinRT": {
         "type": "Direct",
@@ -156,13 +156,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "follywin32": {
@@ -182,14 +182,14 @@
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
           "ReactNative.V8Jsi.Windows": "[0.71.8, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     }
diff --git a/vnext/Desktop/React.Windows.Desktop.vcxproj b/vnext/Desktop/React.Windows.Desktop.vcxproj
index 8b1c4f33bc9..7b4d89f19b4 100644
--- a/vnext/Desktop/React.Windows.Desktop.vcxproj
+++ b/vnext/Desktop/React.Windows.Desktop.vcxproj
@@ -268,7 +268,7 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="boost" Version="1.83.0.0" />
+    <PackageReference Include="boost" Version="1.84.0.0" />
     <PackageReference Include="Microsoft.Windows.CppWinRT" Version="$(CppWinRTVersion)" PrivateAssets="all" />
     <PackageReference Include="Microsoft.JavaScript.Hermes" Version="$(HermesVersion)" />
     <PackageReference Include="$(V8PackageName)" Version="$(V8Version)" Condition="'$(UseV8)' == 'true'" />
diff --git a/vnext/Desktop/packages.experimentalwinui3.lock.json b/vnext/Desktop/packages.experimentalwinui3.lock.json
index 688f695ba36..473590f9c4b 100644
--- a/vnext/Desktop/packages.experimentalwinui3.lock.json
+++ b/vnext/Desktop/packages.experimentalwinui3.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.JavaScript.Hermes": {
         "type": "Direct",
@@ -160,13 +160,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "follywin32": {
@@ -179,7 +179,7 @@
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/vnext/Desktop/packages.lock.json b/vnext/Desktop/packages.lock.json
index d5d37df6295..9c8737a80a6 100644
--- a/vnext/Desktop/packages.lock.json
+++ b/vnext/Desktop/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.JavaScript.Hermes": {
         "type": "Direct",
@@ -160,13 +160,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "follywin32": {
@@ -179,7 +179,7 @@
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/vnext/Folly/Folly.vcxproj b/vnext/Folly/Folly.vcxproj
index 468914293fe..89cbfd6403a 100644
--- a/vnext/Folly/Folly.vcxproj
+++ b/vnext/Folly/Folly.vcxproj
@@ -364,7 +364,7 @@
     <TemporaryFollyPatchFiles Include="$(MSBuildThisFileDirectory)\TEMP_UntilFollyUpdate\**\*.*" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="boost" Version="1.83.0.0" />
+    <PackageReference Include="boost" Version="1.84.0.0" />
   </ItemGroup>
   <Target Name="Deploy" />
   <!-- Reenable this task if we need to temporarily replace any folly files for fixes, while we wait for PRs to land in folly -->
diff --git a/vnext/Folly/packages.lock.json b/vnext/Folly/packages.lock.json
index bcbb94a85ee..669b0b4b521 100644
--- a/vnext/Folly/packages.lock.json
+++ b/vnext/Folly/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       }
     },
     "native,Version=v0.0/win10-arm": {},
diff --git a/vnext/IntegrationTests/React.Windows.IntegrationTests.vcxproj b/vnext/IntegrationTests/React.Windows.IntegrationTests.vcxproj
index da08f967b0a..b57a7440f60 100644
--- a/vnext/IntegrationTests/React.Windows.IntegrationTests.vcxproj
+++ b/vnext/IntegrationTests/React.Windows.IntegrationTests.vcxproj
@@ -89,7 +89,7 @@
     <None Include="XHRTest.js" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="boost" Version="1.83.0.0" />
+    <PackageReference Include="boost" Version="1.84.0.0" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <Target Name="Test">
diff --git a/vnext/IntegrationTests/packages.lock.json b/vnext/IntegrationTests/packages.lock.json
index dbc8e41ae0d..6148fe67e7e 100644
--- a/vnext/IntegrationTests/packages.lock.json
+++ b/vnext/IntegrationTests/packages.lock.json
@@ -4,20 +4,20 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/vnext/Microsoft.ReactNative.CsWinRT/packages.experimentalwinui3.lock.json b/vnext/Microsoft.ReactNative.CsWinRT/packages.experimentalwinui3.lock.json
index 2935d95e384..d25c135cf5b 100644
--- a/vnext/Microsoft.ReactNative.CsWinRT/packages.experimentalwinui3.lock.json
+++ b/vnext/Microsoft.ReactNative.CsWinRT/packages.experimentalwinui3.lock.json
@@ -27,8 +27,8 @@
       },
       "boost": {
         "type": "Transitive",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.Build.Tasks.Git": {
         "type": "Transitive",
@@ -151,13 +151,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -169,14 +169,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[2.0.0-experimental3, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     }
diff --git a/vnext/Microsoft.ReactNative.CsWinRT/packages.lock.json b/vnext/Microsoft.ReactNative.CsWinRT/packages.lock.json
index 5b0777fdebd..cb77e819ec5 100644
--- a/vnext/Microsoft.ReactNative.CsWinRT/packages.lock.json
+++ b/vnext/Microsoft.ReactNative.CsWinRT/packages.lock.json
@@ -27,8 +27,8 @@
       },
       "boost": {
         "type": "Transitive",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.Build.Tasks.Git": {
         "type": "Transitive",
@@ -151,13 +151,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -169,14 +169,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     }
diff --git a/vnext/Microsoft.ReactNative.IntegrationTests/Microsoft.ReactNative.IntegrationTests.vcxproj b/vnext/Microsoft.ReactNative.IntegrationTests/Microsoft.ReactNative.IntegrationTests.vcxproj
index 4f0c69989ec..5f747599497 100644
--- a/vnext/Microsoft.ReactNative.IntegrationTests/Microsoft.ReactNative.IntegrationTests.vcxproj
+++ b/vnext/Microsoft.ReactNative.IntegrationTests/Microsoft.ReactNative.IntegrationTests.vcxproj
@@ -187,7 +187,7 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="boost" Version="1.83.0.0" />
+    <PackageReference Include="boost" Version="1.84.0.0" />
     <PackageReference Include="Microsoft.googletest.v140.windesktop.msvcstl.static.rt-dyn"
       Version="1.8.1.7" />
     <PackageReference Include="Microsoft.VCRTForwarders.140" Version="1.0.6" />
diff --git a/vnext/Microsoft.ReactNative.IntegrationTests/packages.experimentalwinui3.lock.json b/vnext/Microsoft.ReactNative.IntegrationTests/packages.experimentalwinui3.lock.json
index f43683b8dae..e0b8730cdc0 100644
--- a/vnext/Microsoft.ReactNative.IntegrationTests/packages.experimentalwinui3.lock.json
+++ b/vnext/Microsoft.ReactNative.IntegrationTests/packages.experimentalwinui3.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.googletest.v140.windesktop.msvcstl.static.rt-dyn": {
         "type": "Direct",
@@ -164,13 +164,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -182,14 +182,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[2.0.0-experimental3, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/vnext/Microsoft.ReactNative.IntegrationTests/packages.lock.json b/vnext/Microsoft.ReactNative.IntegrationTests/packages.lock.json
index 02b010eb0eb..d799ed05e7a 100644
--- a/vnext/Microsoft.ReactNative.IntegrationTests/packages.lock.json
+++ b/vnext/Microsoft.ReactNative.IntegrationTests/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.googletest.v140.windesktop.msvcstl.static.rt-dyn": {
         "type": "Direct",
@@ -164,13 +164,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "microsoft.reactnative": {
@@ -182,14 +182,14 @@
           "Microsoft.SourceLink.GitHub": "[1.1.1, )",
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/vnext/Microsoft.ReactNative/Microsoft.ReactNative.vcxproj b/vnext/Microsoft.ReactNative/Microsoft.ReactNative.vcxproj
index 4902b41e44a..54e88d81607 100644
--- a/vnext/Microsoft.ReactNative/Microsoft.ReactNative.vcxproj
+++ b/vnext/Microsoft.ReactNative/Microsoft.ReactNative.vcxproj
@@ -426,7 +426,7 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="boost" Version="1.83.0.0" />
+    <PackageReference Include="boost" Version="1.84.0.0" />
     <PackageReference Include="Microsoft.Windows.CppWinRT" Version="$(CppWinRTVersion)" PrivateAssets="all" />
     <PackageReference Include="Microsoft.JavaScript.Hermes" Version="$(HermesVersion)" />
     <PackageReference Include="$(WinUIPackageName)" Version="$(WinUIPackageVersion)" Condition="'$(OverrideWinUIPackage)'!='true'" />
diff --git a/vnext/Microsoft.ReactNative/packages.experimentalwinui3.lock.json b/vnext/Microsoft.ReactNative/packages.experimentalwinui3.lock.json
index 49c697d7e17..bdbbace5db8 100644
--- a/vnext/Microsoft.ReactNative/packages.experimentalwinui3.lock.json
+++ b/vnext/Microsoft.ReactNative/packages.experimentalwinui3.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.JavaScript.Hermes": {
         "type": "Direct",
@@ -154,20 +154,20 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/vnext/Microsoft.ReactNative/packages.lock.json b/vnext/Microsoft.ReactNative/packages.lock.json
index d8ba775e76b..1048682e974 100644
--- a/vnext/Microsoft.ReactNative/packages.lock.json
+++ b/vnext/Microsoft.ReactNative/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.JavaScript.Hermes": {
         "type": "Direct",
@@ -154,20 +154,20 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/vnext/PropertySheets/External/Microsoft.ReactNative.Composition.CppApp.targets b/vnext/PropertySheets/External/Microsoft.ReactNative.Composition.CppApp.targets
index e4877c43c58..4d3e7149ccd 100644
--- a/vnext/PropertySheets/External/Microsoft.ReactNative.Composition.CppApp.targets
+++ b/vnext/PropertySheets/External/Microsoft.ReactNative.Composition.CppApp.targets
@@ -21,8 +21,8 @@
   <Import Project="$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppApp.targets" />
 
   <ItemGroup>
-    <PackageReference Include="boost" Version="1.83.0.0" />
+    <PackageReference Include="boost" Version="1.84.0.0" />
     <PackageReference Include="Microsoft.VCRTForwarders.140" Version="1.0.2-rc" />
   </ItemGroup>
 
-</Project>
+</Project>
\ No newline at end of file
diff --git a/vnext/PropertySheets/External/Microsoft.ReactNative.Composition.CppLib.targets b/vnext/PropertySheets/External/Microsoft.ReactNative.Composition.CppLib.targets
index b97e28e2c05..00809d5e241 100644
--- a/vnext/PropertySheets/External/Microsoft.ReactNative.Composition.CppLib.targets
+++ b/vnext/PropertySheets/External/Microsoft.ReactNative.Composition.CppLib.targets
@@ -23,8 +23,8 @@
   <Import Project="$(ReactNativeWindowsDir)\PropertySheets\Codegen.targets" />
 
   <ItemGroup>
-    <PackageReference Include="boost" Version="1.83.0.0" />
+    <PackageReference Include="boost" Version="1.84.0.0" />
     <PackageReference Include="Microsoft.VCRTForwarders.140" Version="1.0.2-rc" />
   </ItemGroup>
 
-</Project>
+</Project>
\ No newline at end of file
diff --git a/vnext/ReactCommon.UnitTests/ReactCommon.UnitTests.vcxproj b/vnext/ReactCommon.UnitTests/ReactCommon.UnitTests.vcxproj
index 2c5b905f36e..353a7e1bc20 100644
--- a/vnext/ReactCommon.UnitTests/ReactCommon.UnitTests.vcxproj
+++ b/vnext/ReactCommon.UnitTests/ReactCommon.UnitTests.vcxproj
@@ -180,7 +180,7 @@
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
-    <PackageReference Include="boost" Version="1.83.0.0" />
+    <PackageReference Include="boost" Version="1.84.0.0" />
     <PackageReference Include="Microsoft.googletest.v140.windesktop.msvcstl.static.rt-dyn" Version="1.8.1.7" />
     <PackageReference Include="$(V8PackageName)" Version="$(V8Version)" Condition="'$(UseV8)' == 'true'" />
   </ItemGroup>
diff --git a/vnext/ReactCommon.UnitTests/packages.experimentalwinui3.lock.json b/vnext/ReactCommon.UnitTests/packages.experimentalwinui3.lock.json
index ea7ef3a0ffc..8f72cb5618c 100644
--- a/vnext/ReactCommon.UnitTests/packages.experimentalwinui3.lock.json
+++ b/vnext/ReactCommon.UnitTests/packages.experimentalwinui3.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.googletest.v140.windesktop.msvcstl.static.rt-dyn": {
         "type": "Direct",
@@ -157,13 +157,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "follywin32": {
@@ -183,14 +183,14 @@
           "Microsoft.WindowsAppSDK": "[2.0.0-experimental3, )",
           "ReactCommon": "[1.0.0, )",
           "ReactNative.V8Jsi.Windows": "[0.71.8, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/vnext/ReactCommon.UnitTests/packages.lock.json b/vnext/ReactCommon.UnitTests/packages.lock.json
index 6a907a41b97..e7e6709c7e1 100644
--- a/vnext/ReactCommon.UnitTests/packages.lock.json
+++ b/vnext/ReactCommon.UnitTests/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.googletest.v140.windesktop.msvcstl.static.rt-dyn": {
         "type": "Direct",
@@ -157,13 +157,13 @@
       "common": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "follywin32": {
@@ -183,14 +183,14 @@
           "Microsoft.WindowsAppSDK": "[1.8.260209005, )",
           "ReactCommon": "[1.0.0, )",
           "ReactNative.V8Jsi.Windows": "[0.71.8, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       },
       "reactcommon": {
         "type": "Project",
         "dependencies": {
           "Folly": "[1.0.0, )",
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },
diff --git a/vnext/ReactCommon/ReactCommon.vcxproj b/vnext/ReactCommon/ReactCommon.vcxproj
index 3459b66da87..7a053eda7fc 100644
--- a/vnext/ReactCommon/ReactCommon.vcxproj
+++ b/vnext/ReactCommon/ReactCommon.vcxproj
@@ -245,7 +245,7 @@
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="boost" Version="1.83.0.0" />
+    <PackageReference Include="boost" Version="1.84.0.0" />
     <PackageReference Include="Microsoft.Windows.CppWinRT" Version="$(CppWinRTVersion)" PrivateAssets="all" />
   </ItemGroup>
   <PropertyGroup>
diff --git a/vnext/ReactCommon/packages.lock.json b/vnext/ReactCommon/packages.lock.json
index cd79e534e0f..a08a1916575 100644
--- a/vnext/ReactCommon/packages.lock.json
+++ b/vnext/ReactCommon/packages.lock.json
@@ -4,9 +4,9 @@
     "native,Version=v0.0": {
       "boost": {
         "type": "Direct",
-        "requested": "[1.83.0, )",
-        "resolved": "1.83.0",
-        "contentHash": "cy53VNMzysEMvhBixDe8ujPk67Fcj3v6FPHQnH91NYJNLHpc6jxa2xq9ruCaaJjE4M3YrGSHDi4uUSTGBWw6EQ=="
+        "requested": "[1.84.0, )",
+        "resolved": "1.84.0",
+        "contentHash": "4el2YP3cNJDVFPdzOso+LxGvdWP2rHxML4siq8VdonNypW2m4q503tHfCj6vK0L1UfxioE2hpFGb4ITEua73tg=="
       },
       "Microsoft.Windows.CppWinRT": {
         "type": "Direct",
@@ -17,7 +17,7 @@
       "folly": {
         "type": "Project",
         "dependencies": {
-          "boost": "[1.83.0, )"
+          "boost": "[1.84.0, )"
         }
       }
     },