The Republic of Dagestan ( /dɑːɡɨˈstɑːn/ or /dæɡɨˈstæn/; Russian: Респу́блика Дагеста́н, Respublika Dagestan; also spelled Daghestan) is a federal subject (a republic) of Russia, located in the North Caucasus region. Its capital and the largest city is Makhachkala, located at the center of Dagestan on the Caspian Sea. Population: 2,910,249 (2010 Census).