diff --git a/reflex/config.py b/reflex/config.py
index 8b961a6b88b..c9babf45e0a 100644
--- a/reflex/config.py
+++ b/reflex/config.py
@@ -284,6 +284,9 @@ class Config(BaseConfig):
     See the [configuration](https://reflex.dev/docs/getting-started/configuration/) docs for more info.
     """
 
+    # Track whether the app name has already been validated for this Config instance.
+    _app_name_is_valid: bool = dataclasses.field(default=False, repr=False)
+
     def _post_init(self, **kwargs):
         """Post-initialization method to set up the config.
 
diff --git a/reflex/utils/prerequisites.py b/reflex/utils/prerequisites.py
index 1a2c429c4f1..eb7ca99f420 100644
--- a/reflex/utils/prerequisites.py
+++ b/reflex/utils/prerequisites.py
@@ -165,6 +165,7 @@ def _check_app_name(config: Config):
             else:
                 msg += f"Ensure app_name='{config.app_name}' in rxconfig.py matches your folder structure."
             raise ModuleNotFoundError(msg)
+    config._app_name_is_valid = True
 
 
 def get_app(reload: bool = False) -> ModuleType:
@@ -184,7 +185,9 @@ def get_app(reload: bool = False) -> ModuleType:
     try:
         config = get_config()
 
-        _check_app_name(config)
+        # Avoid hitting disk when the app name has already been validated in this process.
+        if not config._app_name_is_valid:
+            _check_app_name(config)
 
         module = config.module
         sys.path.insert(0, str(Path.cwd()))