The Tunceli Province (Kurdish: parêzgeh Dêrsim, Zazaki: Dêsim, ) formerly Dersim Province is a majority Alevi Zaza Kurdish with a minority Sunni Turkish population in the Eastern Anatolia region of Turkey. The province was named Dersim Province (Dersim vilayeti ), then demoted district (Dersim kazası ) and incorporated into Elâzığ Province in 1926. Finally it was changed to Tunceli Province on January 4, 1936. with the "Law on Administration of the Tunceli Province" (Tunceli Vilayetinin İdaresi Hakkında Kanun), no. 2884 of 25 December 1935. But some still call the region by this name. The capital city is Tunceli. The name of the provincial capital, Kalan, was then officially changed to match with the province's name.
Its adjacent provinces are Erzincan to the north and west, Elazığ to the south, and Bingöl to the east. The province covers an area of and has a population of 76,699. It has the lowest population density of any province in Turkey, just 9.8 inhabitants/km². Dersim is the only province of Turkey with an Alevi majority.
Tunceli is known for its old buildings such as the Çelebi Ağa Mosque, Sağman Mosque, Elti Hatun Mosque and adjoining Tomb and impressive natural scenery, especially in Munzur Valley National Park, the largest national park of Turkey.