Not Found may refer to:
- "Not found", a song by Fe12 featuring Hatsune Miku.
- "Not Found" (ノットファウンド), a song by Gingin featuring Kagamine Rin.
- "Not Found", a song by Ichinose Lupo featuring Hatsune Miku.
- "Not Found", a song by Kirin featuring Aoki Lapis or IA.