The Urum language (formerly Greco-Tatar, self-designated as Urum tili or Urum dili) is a Turkic language spoken by the Urum Greeks residing in the northern Azov region (Ukraine), where they were resettled by the Russian government from Crimea in 1778.

It is primarily spoken in localized settlements of the Urum people within the Donetsk and Zaporizhzhia regions.

A small diaspora exists in Greece. The term "Urum language" is sometimes also applied to the Tsalka language—a dialect of Turkish spoken by the Tsalka Greeks living in Georgia.

The Urum language is closely related to Crimean Tatar. It likely developed from the language of the Cumans (Kipchaks), the core tribal confederation that emerged in Eastern Europe in the mid-10th century and occupied vast territories in the east (Desht-i-Kipchak) and west (the Black Sea steppes, and later Crimea and part of the Balkan Peninsula). Some authors consider it a dialect of Crimean Tatar, while others classify it as a distinct language.

Due to limited research, there is no unified classification of the Urum dialects. S.N. Muratov identifies three dialects:

- Kipchak (including the Beshev, Yanisol, and Mangush subdialects);
- Oghuz (including the Mariupol and Old Crimean subdialects);
- Intermediate, further divided into subdialects with minor Oghuz influence (Bogatyr, Kermenchik, Ulakly) and those with greater Oghuz influence (Ignatievka, Karan, Komar, Laspi).

Meanwhile, A.N. Garkavets proposes four dialects in the Urum language:

- Kipchak-Cuman subdialects (Velyka Novosilka, Starobeshevo, Mangush);
- Kipchak-Oghuz subdialects (Stary Kermenchik, Bogatyr, Ulakly);
- Oghuz-Kipchak subdialects (Karan, Starolaspa, Kamara, Gurji);
- Oghuz subdialects (Mariupol, Stary Krym, Karakuba).

A supradialectal folklore language is also recognized, which contains significantly more Oghuz lexical and morphological elements than the vernacular subdialects.