Tunkás Municipality (In the Yucatec Maya language: “bad or ugly stone”) is a municipality in the Mexican state of Yucatán containing 514.79 square kilometres (198.76 sq mi) of land and located roughly 98 kilometres (61 mi) east of the city of Mérida.

Tunakseños migrate to the beach resorts of Quintana Roo, mostly Cancún and Playa del Carmen, as well as to the United States.

[citation needed] In ancient history, the area belonged to the chieftainship of Cupul until the conquest.

At colonization, Tunkás became part of the encomienda system and the encomenderos listed in 1735 were Diego Ramón del Castillo y Juan and Baltazar de la Cámara.

From 30 January to 2 February, an annual fair is held which attracts people from other areas of the region.