diff --git a/docs/framework/react/api/router/NotFoundErrorType.md b/docs/framework/react/api/router/NotFoundErrorType.md
index 54a1904eee..994a8430e8 100644
--- a/docs/framework/react/api/router/NotFoundErrorType.md
+++ b/docs/framework/react/api/router/NotFoundErrorType.md
@@ -24,6 +24,16 @@ The `NotFoundError` object accepts/contains the following properties:
 - Optional
 - Custom data that is passed into to `notFoundComponent` when the not-found error is handled
 
+It is possible to override the `any` type with your own more specific type by extending the `NotFoundErrorData` interface:
+
+```ts
+declare module '@tanstack/react-router' {
+  interface NotFoundErrorData {
+    data: /* your type here */
+  }
+}
+```
+
 ### `global` property
 
 - Type: `boolean`
diff --git a/packages/react-router/src/index.tsx b/packages/react-router/src/index.tsx
index c4dd49bafc..04211096c0 100644
--- a/packages/react-router/src/index.tsx
+++ b/packages/react-router/src/index.tsx
@@ -338,7 +338,7 @@ export {
   CatchNotFound,
   DefaultGlobalNotFound,
 } from './not-found'
-export type { NotFoundError } from './not-found'
+export type { NotFoundError, NotFoundErrorData } from './not-found'
 
 export type { Manifest, RouterManagedTag } from './manifest'
 
diff --git a/packages/react-router/src/not-found.tsx b/packages/react-router/src/not-found.tsx
index 9db1d473e0..59e2c68d39 100644
--- a/packages/react-router/src/not-found.tsx
+++ b/packages/react-router/src/not-found.tsx
@@ -5,6 +5,8 @@ import type { ErrorInfo } from 'react'
 import type { RegisteredRouter } from './router'
 import type { RouteIds } from './routeInfo'
 
+export interface NotFoundErrorData {}
+
 export type NotFoundError = {
   /**
     @deprecated
@@ -16,7 +18,19 @@ export type NotFoundError = {
     Do not use this. It's used internally to indicate a path matching error
   */
   _global?: boolean
-  data?: any
+  /**
+    This property can be typed globally using the `NotFoundErrorData` interface
+    ```ts
+    declare module '@tanstack/react-router' {
+      interface NotFoundErrorData {
+        data: {
+          // your properties here
+        }
+      }
+    }
+    ```
+   */
+  data?: NotFoundErrorData extends { data: infer TData } ? TData : any
   throw?: boolean
   routeId?: RouteIds<RegisteredRouter['routeTree']>
   headers?: HeadersInit
diff --git a/packages/react-router/src/route.ts b/packages/react-router/src/route.ts
index 9c5c265296..3e8ec3efb3 100644
--- a/packages/react-router/src/route.ts
+++ b/packages/react-router/src/route.ts
@@ -1599,7 +1599,7 @@ export type ErrorComponentProps = {
 }
 export type NotFoundRouteProps = {
   // TODO: Make sure this is `| null | undefined` (this is for global not-founds)
-  data: unknown
+  data: NotFoundError['data'] | null | undefined
 }
 //