- Language: Gagauz
- Alternate names: Gagauzi
- Language code: gag
- Language family: Turkic, Common Turkic, Oghuz, Nuclear Oghuz, West Oghuz
- Number of speakers: 173,920.
- Script: Cyrillic script, primary usage. Greek script, used until 1957. Latin script, used in Romania.
Gagauz is a Turkic language spoken by the Gagauz people of Moldova, Ukraine, Russia and Turkey and it is the official language of the Autonomous Region of Gagauzia in Moldova. Gagauz belongs to the Oghuz branch of Turkic languages, alongside Azerbaijani, Turkmen, Crimean Tatar and Turkish. Gagauz has two dialects, Bulgar Gagauzi and Maritime Gagauzi. Gagauz is a distinct language from Balkan Gagauz Turkish.