Gagauzia or Gagauz-Yeri, officially the Autonomous Territorial Unit of Gagauzia (ATUG), is an autonomous territorial unit of Moldova. Its autonomy is intended for the local Gagauz people, a Turkic-speaking, primarily Orthodox ethnic group.

The Gagauz are a Turkic ethnic group native to southern Moldova and southwestern Ukraine (Budjak). Gagauz are mostly Eastern Orthodox Christians. The term Gagauz is also often used as a collective naming of Turkic people living in the Balkans, speaking the Gagauz language, a language separated from Balkan Gagauz Turkish.