diff --git a/web/src/stores/dandiset.ts b/web/src/stores/dandiset.ts
index ed3e0598c..b44a314f6 100644
--- a/web/src/stores/dandiset.ts
+++ b/web/src/stores/dandiset.ts
@@ -52,7 +52,10 @@ export const useDandisetStore = defineStore('dandiset', {
       // this can be done concurrently, don't await
       this.fetchDandisetVersions({ identifier });
       await this.fetchDandiset({ identifier, version });
-      await this.fetchOwners(identifier);
+
+      if (this.dandiset) {
+        await this.fetchOwners(identifier);
+      }
     },
     async fetchDandisetVersions({ identifier }: Record<string, string>) {
       let res;
diff --git a/web/src/views/DandisetLandingView/DandisetLandingView.vue b/web/src/views/DandisetLandingView/DandisetLandingView.vue
index c4f85eac2..622b9be17 100644
--- a/web/src/views/DandisetLandingView/DandisetLandingView.vue
+++ b/web/src/views/DandisetLandingView/DandisetLandingView.vue
@@ -10,6 +10,24 @@
       />
     </v-toolbar>
     <v-container
+      v-if="dandisetDoesNotExist"
+      class="d-flex justify-center align-center"
+      style="height: 50vh;"
+    >
+      <div class="d-block">
+        <span class="text-h5">
+          <v-icon>mdi-alert</v-icon>
+          Error: Dandiset does not exist
+        </span>
+        <br><br>
+        <span class="text-body-2">
+          Proceed to the <a href="/dandiset">Public Dandisets page</a>
+          or use the search bar to find a valid Dandiset.
+        </span>
+      </div>
+    </v-container>
+    <v-container
+      v-else
       fluid
       class="grey lighten-4 pa-0"
     >
@@ -117,6 +135,10 @@ const store = useDandisetStore();
 
 const currentDandiset = computed(() => store.dandiset);
 const loading = ref(false);
+
+// If loading is finished and currentDandiset is still null, the dandiset doesn't exist.
+const dandisetDoesNotExist = computed(() => !loading.value && !currentDandiset.value);
+
 const schema = computed(() => store.schema);
 const userCanModifyDandiset = computed(() => store.userCanModifyDandiset);
 
diff --git a/web/test/src/tests/dandisetLandingPage.test.js b/web/test/src/tests/dandisetLandingPage.test.js
index d9bdda587..0b2eecaf6 100644
--- a/web/test/src/tests/dandisetLandingPage.test.js
+++ b/web/test/src/tests/dandisetLandingPage.test.js
@@ -6,6 +6,7 @@ import {
   logout,
   waitForRequestsToFinish,
   clearCookiesAndCache,
+  CLIENT_URL,
 } from '../util';
 
 describe('dandiset landing page', () => {
@@ -60,4 +61,10 @@ describe('dandiset landing page', () => {
     await expect(page).toContainXPath(vChip(otherUserName));
     await expect(page).toContainXPath(vChip(ownerName));
   });
+
+  it('navigate to an invalid dandiset URL', async () => {
+    await page.goto(new URL('/dandiset/1', CLIENT_URL).href);
+    await waitForRequestsToFinish();
+    await expect(page).toMatch('Error: Dandiset does not exist');
+  });
 });