diff --git a/homeassistant/components/onedrive/backup.py b/homeassistant/components/onedrive/backup.py
index a5a5c019797..94d60bc6398 100644
--- a/homeassistant/components/onedrive/backup.py
+++ b/homeassistant/components/onedrive/backup.py
@@ -190,7 +190,13 @@ class OneDriveBackupAgent(BackupAgent):
         **kwargs: Any,
     ) -> None:
         """Delete a backup file."""
-        await self._get_backup_file_item(backup_id).delete()
+
+        try:
+            await self._get_backup_file_item(backup_id).delete()
+        except APIError as err:
+            if err.response_status_code == 404:
+                return
+            raise
 
     @handle_backup_errors
     async def async_list_backups(self, **kwargs: Any) -> list[AgentBackup]:
diff --git a/tests/components/onedrive/test_backup.py b/tests/components/onedrive/test_backup.py
index a3d1129377f..3492202d3fe 100644
--- a/tests/components/onedrive/test_backup.py
+++ b/tests/components/onedrive/test_backup.py
@@ -156,6 +156,28 @@ async def test_agents_delete(
     mock_drive_items.delete.assert_called_once()
 
 
+async def test_agents_delete_not_found_does_not_throw(
+    hass: HomeAssistant,
+    hass_ws_client: WebSocketGenerator,
+    mock_drive_items: MagicMock,
+) -> None:
+    """Test agent delete backup."""
+    mock_drive_items.delete = AsyncMock(side_effect=APIError(response_status_code=404))
+    client = await hass_ws_client(hass)
+
+    await client.send_json_auto_id(
+        {
+            "type": "backup/delete",
+            "backup_id": BACKUP_METADATA["backup_id"],
+        }
+    )
+    response = await client.receive_json()
+
+    assert response["success"]
+    assert response["result"] == {"agent_errors": {}}
+    mock_drive_items.delete.assert_called_once()
+
+
 async def test_agents_upload(
     hass_client: ClientSessionGenerator,
     caplog: pytest.LogCaptureFixture,
@@ -257,7 +279,7 @@ async def test_agents_download(
     ("side_effect", "error"),
     [
         (
-            APIError(response_status_code=404, message="File not found."),
+            APIError(response_status_code=500),
             "Backup operation failed",
         ),
         (TimeoutError(), "Backup operation timed out"),