diff --git a/packages/react-router/tests/useParams.test.tsx b/packages/react-router/tests/useParams.test.tsx
new file mode 100644
index 00000000000..8aa2618bf6c
--- /dev/null
+++ b/packages/react-router/tests/useParams.test.tsx
@@ -0,0 +1,261 @@
+import { expect, test } from 'vitest'
+import { act, fireEvent, render, screen } from '@testing-library/react'
+import {
+  Link,
+  Outlet,
+  RouterProvider,
+  createRootRoute,
+  createRoute,
+  createRouter,
+  useParams,
+} from '../src'
+
+test('useParams must return parsed result if applicable.', async () => {
+  const posts = [
+    {
+      id: 1,
+      title: 'First Post',
+      category: 'one',
+    },
+    {
+      id: 2,
+      title: 'Second Post',
+      category: 'two',
+    },
+  ]
+
+  const rootRoute = createRootRoute()
+
+  const postsRoute = createRoute({
+    getParentRoute: () => rootRoute,
+    path: 'posts',
+    component: PostsComponent,
+  })
+
+  const postCategoryRoute = createRoute({
+    getParentRoute: () => postsRoute,
+    path: 'category_{$category}',
+    component: PostCategoryComponent,
+    params: {
+      parse: (params) => {
+        return {
+          ...params,
+          category:
+            params.category === 'first'
+              ? 'one'
+              : params.category === 'second'
+                ? 'two'
+                : params.category,
+        }
+      },
+      stringify: (params) => {
+        return {
+          category:
+            params.category === 'one'
+              ? 'first'
+              : params.category === 'two'
+                ? 'second'
+                : params.category,
+        }
+      },
+    },
+    loader: ({ params }) => ({
+      posts:
+        params.category === 'all'
+          ? posts
+          : posts.filter((post) => post.category === params.category),
+    }),
+  })
+
+  const postRoute = createRoute({
+    getParentRoute: () => postCategoryRoute,
+    path: '$postId',
+    params: {
+      parse: (params) => {
+        return {
+          ...params,
+          id: params.postId === 'one' ? 1 : 2,
+        }
+      },
+      stringify: (params) => {
+        return {
+          postId: params.id === 1 ? 'one' : 'two',
+        }
+      },
+    },
+    component: PostComponent,
+    loader: ({ params }) => ({
+      post: posts.find((post) => post.id === params.id),
+    }),
+  })
+
+  function PostsComponent() {
+    return (
+      <div>
+        <h1 data-testid="posts-heading">Posts</h1>
+        <Link
+          data-testid="all-category-link"
+          to={postCategoryRoute.fullPath}
+          params={{ category: 'all' }}
+        >
+          All Categories
+        </Link>
+        <Link
+          data-testid="first-category-link"
+          to={postCategoryRoute.fullPath}
+          params={{ category: 'first' }}
+        >
+          First Category
+        </Link>
+        <Outlet />
+      </div>
+    )
+  }
+
+  function PostCategoryComponent() {
+    const data = postCategoryRoute.useLoaderData()
+
+    return (
+      <div>
+        <h1 data-testid="post-category-heading">Post Categories</h1>
+        {data.posts.map((post: (typeof posts)[number]) => {
+          const id = post.id === 1 ? 'one' : 'two'
+          return (
+            <Link
+              key={id}
+              from={postCategoryRoute.fullPath}
+              to={`./${id}`}
+              data-testid={`post-${id}-link`}
+            >
+              {post.title}
+            </Link>
+          )
+        })}
+        <Outlet />
+      </div>
+    )
+  }
+
+  function PostComponent() {
+    const params = useParams({ from: postRoute.fullPath })
+
+    const data = postRoute.useLoaderData()
+
+    return (
+      <div>
+        <h1 data-testid="post-heading">Post Route</h1>
+        <div>
+          Category_Param:{' '}
+          <span data-testid="param_category_value">{params.category}</span>
+        </div>
+        <div>
+          PostId_Param:{' '}
+          <span data-testid="param_postId_value">{params.postId}</span>
+        </div>
+        <div>
+          Id_Param: <span data-testid="param_id_value">{params.id}</span>
+        </div>
+        <div>
+          PostId: <span data-testid="post_id_value">{data.post.id}</span>
+        </div>
+        <div>
+          Title: <span data-testid="post_title_value">{data.post.title}</span>
+        </div>
+        <div>
+          Category:{' '}
+          <span data-testid="post_category_value">{data.post.category}</span>
+        </div>
+      </div>
+    )
+  }
+
+  window.history.replaceState({}, '', '/posts')
+
+  const router = createRouter({
+    routeTree: rootRoute.addChildren([
+      postsRoute.addChildren([postCategoryRoute.addChildren([postRoute])]),
+    ]),
+  })
+
+  render(<RouterProvider router={router} />)
+
+  await act(() => router.load())
+
+  expect(await screen.findByTestId('posts-heading')).toBeInTheDocument()
+
+  const firstCategoryLink = await screen.findByTestId('first-category-link')
+
+  expect(firstCategoryLink).toBeInTheDocument()
+
+  await act(() => fireEvent.click(firstCategoryLink))
+
+  expect(window.location.pathname).toBe('/posts/category_first')
+
+  const postCategoryHeading = await screen.findByTestId('post-category-heading')
+  const firstPostLink = await screen.findByTestId('post-one-link')
+
+  expect(postCategoryHeading).toBeInTheDocument()
+
+  fireEvent.click(firstPostLink)
+
+  let postHeading = await screen.findByTestId('post-heading')
+  let paramCategoryValue = await screen.findByTestId('param_category_value')
+  let paramPostIdValue = await screen.findByTestId('param_postId_value')
+  let paramIdValue = await screen.findByTestId('param_id_value')
+  let postCategory = await screen.findByTestId('post_category_value')
+  let postTitleValue = await screen.findByTestId('post_title_value')
+  let postIdValue = await screen.findByTestId('post_id_value')
+
+  expect(window.location.pathname).toBe('/posts/category_first/one')
+  expect(postHeading).toBeInTheDocument()
+
+  let renderedPost = {
+    id: parseInt(postIdValue.textContent),
+    title: postTitleValue.textContent,
+    category: postCategory.textContent,
+  }
+
+  expect(renderedPost).toEqual(posts[0])
+  expect(renderedPost.category).toBe('one')
+  expect(paramCategoryValue.textContent).toBe('one')
+  expect(paramPostIdValue.textContent).toBe('one')
+  expect(paramIdValue.textContent).toBe('1')
+
+  const allCategoryLink = await screen.findByTestId('all-category-link')
+
+  expect(allCategoryLink).toBeInTheDocument()
+
+  await act(() => fireEvent.click(allCategoryLink))
+
+  expect(window.location.pathname).toBe('/posts/category_all')
+
+  const secondPostLink = await screen.findByTestId('post-two-link')
+
+  expect(postCategoryHeading).toBeInTheDocument()
+  expect(secondPostLink).toBeInTheDocument()
+
+  fireEvent.click(secondPostLink)
+
+  postHeading = await screen.findByTestId('post-heading')
+  paramCategoryValue = await screen.findByTestId('param_category_value')
+  paramPostIdValue = await screen.findByTestId('param_postId_value')
+  paramIdValue = await screen.findByTestId('param_id_value')
+  postCategory = await screen.findByTestId('post_category_value')
+  postTitleValue = await screen.findByTestId('post_title_value')
+  postIdValue = await screen.findByTestId('post_id_value')
+
+  expect(window.location.pathname).toBe('/posts/category_all/two')
+  expect(postHeading).toBeInTheDocument()
+
+  renderedPost = {
+    id: parseInt(postIdValue.textContent),
+    title: postTitleValue.textContent,
+    category: postCategory.textContent,
+  }
+
+  expect(renderedPost).toEqual(posts[1])
+  expect(renderedPost.category).toBe('two')
+  expect(paramCategoryValue.textContent).toBe('all')
+  expect(paramPostIdValue.textContent).toBe('two')
+  expect(paramIdValue.textContent).toBe('2')
+})
diff --git a/packages/router-core/src/router.ts b/packages/router-core/src/router.ts
index a662e5d9e36..00c3f8fd9bf 100644
--- a/packages/router-core/src/router.ts
+++ b/packages/router-core/src/router.ts
@@ -1301,20 +1301,44 @@ export class RouterCore<
 
       const loaderDepsHash = loaderDeps ? JSON.stringify(loaderDeps) : ''
 
-      const { usedParams, interpolatedPath } = interpolatePath({
+      const { interpolatedPath } = interpolatePath({
         path: route.fullPath,
         params: routeParams,
         decodeCharMap: this.pathParamsDecodeCharMap,
       })
 
-      const matchId =
-        interpolatePath({
-          path: route.id,
-          params: routeParams,
-          leaveWildcards: true,
-          decodeCharMap: this.pathParamsDecodeCharMap,
-          parseCache: this.parsePathnameCache,
-        }).interpolatedPath + loaderDepsHash
+      const interpolatePathResult = interpolatePath({
+        path: route.id,
+        params: routeParams,
+        leaveWildcards: true,
+        decodeCharMap: this.pathParamsDecodeCharMap,
+        parseCache: this.parsePathnameCache,
+      })
+
+      const strictParams = interpolatePathResult.usedParams
+
+      let paramsError = parseErrors[index]
+
+      const strictParseParams =
+        route.options.params?.parse ?? route.options.parseParams
+
+      if (strictParseParams) {
+        try {
+          Object.assign(strictParams, strictParseParams(strictParams as any))
+        } catch (err: any) {
+          // any param errors should already have been dealt with above, if this
+          // somehow differs, let's report this in the same manner
+          if (!paramsError) {
+            paramsError = new PathParamError(err.message, {
+              cause: err,
+            })
+
+            if (opts?.throwOnError) {
+              throw paramsError
+            }
+          }
+        }
+      }
 
       // Waste not, want not. If we already have a match for this route,
       // reuse it. This is important for layout routes, which might stick
@@ -1322,6 +1346,8 @@ export class RouterCore<
 
       // Existing matches are matches that are already loaded along with
       // pending matches that are still loading
+      const matchId = interpolatePathResult.interpolatedPath + loaderDepsHash
+
       const existingMatch = this.getMatch(matchId)
 
       const previousMatch = this.state.matches.find(
@@ -1339,7 +1365,7 @@ export class RouterCore<
           params: previousMatch
             ? replaceEqualDeep(previousMatch.params, routeParams)
             : routeParams,
-          _strictParams: usedParams,
+          _strictParams: strictParams,
           search: previousMatch
             ? replaceEqualDeep(previousMatch.search, preMatchSearch)
             : replaceEqualDeep(existingMatch.search, preMatchSearch),
@@ -1361,7 +1387,7 @@ export class RouterCore<
           params: previousMatch
             ? replaceEqualDeep(previousMatch.params, routeParams)
             : routeParams,
-          _strictParams: usedParams,
+          _strictParams: strictParams,
           pathname: interpolatedPath,
           updatedAt: Date.now(),
           search: previousMatch
@@ -1372,7 +1398,7 @@ export class RouterCore<
           status,
           isFetching: false,
           error: undefined,
-          paramsError: parseErrors[index],
+          paramsError: paramsError,
           __routeContext: undefined,
           _nonReactive: {
             loadPromise: createControlledPromise(),
diff --git a/packages/solid-router/tests/useParams.test.tsx b/packages/solid-router/tests/useParams.test.tsx
new file mode 100644
index 00000000000..8cab883e44f
--- /dev/null
+++ b/packages/solid-router/tests/useParams.test.tsx
@@ -0,0 +1,257 @@
+import { expect, test } from 'vitest'
+import { fireEvent, render, screen, waitFor } from '@solidjs/testing-library'
+import {
+  Link,
+  Outlet,
+  RouterProvider,
+  createRootRoute,
+  createRoute,
+  createRouter,
+  useParams,
+} from '../src'
+
+test('useParams must return parsed result if applicable.', async () => {
+  const posts = [
+    {
+      id: 1,
+      title: 'First Post',
+      category: 'one',
+    },
+    {
+      id: 2,
+      title: 'Second Post',
+      category: 'two',
+    },
+  ]
+
+  const rootRoute = createRootRoute()
+
+  const postsRoute = createRoute({
+    getParentRoute: () => rootRoute,
+    path: 'posts',
+    component: PostsComponent,
+  })
+
+  const postCategoryRoute = createRoute({
+    getParentRoute: () => postsRoute,
+    path: 'category_{$category}',
+    component: PostCategoryComponent,
+    params: {
+      parse: (params) => {
+        return {
+          ...params,
+          category:
+            params.category === 'first'
+              ? 'one'
+              : params.category === 'second'
+                ? 'two'
+                : params.category,
+        }
+      },
+      stringify: (params) => {
+        return {
+          category:
+            params.category === 'one'
+              ? 'first'
+              : params.category === 'two'
+                ? 'second'
+                : params.category,
+        }
+      },
+    },
+    loader: ({ params }) => ({
+      posts:
+        params.category === 'all'
+          ? posts
+          : posts.filter((post) => post.category === params.category),
+    }),
+  })
+
+  const postRoute = createRoute({
+    getParentRoute: () => postCategoryRoute,
+    path: '$postId',
+    params: {
+      parse: (params) => {
+        return {
+          ...params,
+          id: params.postId === 'one' ? 1 : 2,
+        }
+      },
+      stringify: (params) => {
+        return {
+          postId: params.id === 1 ? 'one' : 'two',
+        }
+      },
+    },
+    component: PostComponent,
+    loader: ({ params }) => ({
+      post: posts.find((post) => post.id === params.id),
+    }),
+  })
+
+  function PostsComponent() {
+    return (
+      <div>
+        <h1 data-testid="posts-heading">Posts</h1>
+        <Link
+          data-testid="all-category-link"
+          to={postCategoryRoute.fullPath}
+          params={{ category: 'all' }}
+        >
+          All Categories
+        </Link>
+        <Link
+          data-testid="first-category-link"
+          to={postCategoryRoute.fullPath}
+          params={{ category: 'first' }}
+        >
+          First Category
+        </Link>
+        <Outlet />
+      </div>
+    )
+  }
+
+  function PostCategoryComponent() {
+    const data = postCategoryRoute.useLoaderData()
+
+    return (
+      <div>
+        <h1 data-testid="post-category-heading">Post Categories</h1>
+        {data().posts.map((post: (typeof posts)[number]) => {
+          const id = post.id === 1 ? 'one' : 'two'
+          return (
+            <Link
+              from={postCategoryRoute.fullPath}
+              to={`./${id}`}
+              data-testid={`post-${id}-link`}
+            >
+              {post.title}
+            </Link>
+          )
+        })}
+        <Outlet />
+      </div>
+    )
+  }
+
+  function PostComponent() {
+    const params = useParams({ from: postRoute.fullPath })
+
+    const data = postRoute.useLoaderData()
+
+    return (
+      <div>
+        <h1 data-testid="post-heading">Post Route</h1>
+        <div>
+          Category_Param:{' '}
+          <span data-testid="param_category_value">{params().category}</span>
+        </div>
+        <div>
+          PostId_Param:{' '}
+          <span data-testid="param_postId_value">{params().postId}</span>
+        </div>
+        <div>
+          Id_Param: <span data-testid="param_id_value">{params().id}</span>
+        </div>
+        <div>
+          PostId: <span data-testid="post_id_value">{data().post.id}</span>
+        </div>
+        <div>
+          Title: <span data-testid="post_title_value">{data().post.title}</span>
+        </div>
+        <div>
+          Category:{' '}
+          <span data-testid="post_category_value">{data().post.category}</span>
+        </div>
+      </div>
+    )
+  }
+
+  window.history.replaceState({}, '', '/posts')
+
+  const router = createRouter({
+    routeTree: rootRoute.addChildren([
+      postsRoute.addChildren([postCategoryRoute.addChildren([postRoute])]),
+    ]),
+  })
+
+  render(() => <RouterProvider router={router} />)
+
+  await waitFor(() => router.load())
+
+  expect(await screen.findByTestId('posts-heading')).toBeInTheDocument()
+
+  const firstCategoryLink = await screen.findByTestId('first-category-link')
+
+  expect(firstCategoryLink).toBeInTheDocument()
+
+  await waitFor(() => fireEvent.click(firstCategoryLink))
+
+  expect(window.location.pathname).toBe('/posts/category_first')
+
+  const firstPostLink = await screen.findByTestId('post-one-link')
+
+  expect(await screen.findByTestId('post-category-heading')).toBeInTheDocument()
+
+  await waitFor(() => fireEvent.click(firstPostLink))
+
+  let paramCategoryValue = await screen.findByTestId('param_category_value')
+  let paramPostIdValue = await screen.findByTestId('param_postId_value')
+  let paramIdValue = await screen.findByTestId('param_id_value')
+  let postCategory = await screen.findByTestId('post_category_value')
+  let postTitleValue = await screen.findByTestId('post_title_value')
+  let postIdValue = await screen.findByTestId('post_id_value')
+
+  expect(window.location.pathname).toBe('/posts/category_first/one')
+  expect(await screen.findByTestId('post-heading')).toBeInTheDocument()
+
+  let renderedPost = {
+    id: parseInt(postIdValue.textContent),
+    title: postTitleValue.textContent,
+    category: postCategory.textContent,
+  }
+
+  expect(renderedPost).toEqual(posts[0])
+  expect(renderedPost.category).toBe('one')
+  expect(paramCategoryValue.textContent).toBe('one')
+  expect(paramPostIdValue.textContent).toBe('one')
+  expect(paramIdValue.textContent).toBe('1')
+
+  const allCategoryLink = await screen.findByTestId('all-category-link')
+
+  expect(allCategoryLink).toBeInTheDocument()
+
+  await waitFor(() => fireEvent.click(allCategoryLink))
+
+  expect(window.location.pathname).toBe('/posts/category_all')
+
+  const secondPostLink = await screen.findByTestId('post-two-link')
+
+  expect(await screen.findByTestId('post-category-heading')).toBeInTheDocument()
+  expect(secondPostLink).toBeInTheDocument()
+
+  await waitFor(() => fireEvent.click(secondPostLink))
+
+  paramCategoryValue = await screen.findByTestId('param_category_value')
+  paramPostIdValue = await screen.findByTestId('param_postId_value')
+  paramIdValue = await screen.findByTestId('param_id_value')
+  postCategory = await screen.findByTestId('post_category_value')
+  postTitleValue = await screen.findByTestId('post_title_value')
+  postIdValue = await screen.findByTestId('post_id_value')
+
+  expect(window.location.pathname).toBe('/posts/category_all/two')
+  expect(await screen.findByTestId('post-heading')).toBeInTheDocument()
+
+  renderedPost = {
+    id: parseInt(postIdValue.textContent),
+    title: postTitleValue.textContent,
+    category: postCategory.textContent,
+  }
+
+  expect(renderedPost).toEqual(posts[1])
+  expect(renderedPost.category).toBe('two')
+  expect(paramCategoryValue.textContent).toBe('all')
+  expect(paramPostIdValue.textContent).toBe('two')
+  expect(paramIdValue.textContent).toBe('2')
+})