The Republic of Mordovia (Russian: Респу́блика Мордо́вия, Respublika Mordoviya; Moksha/Erzya: Мордовия Республикась, Mordoviya Respublikas), also known as Mordvinia, is a federal subject of Russia (a republic). Its capital is the city of Saransk. Population: 834,755 (2010 Census).