Urmarsky District (Russian: Урма́рский райо́н; Chuvash: Вăрмар районĕ) is an administrative and municipal district (raion), one of the twenty-one in the Chuvash Republic, Russia. It is located in the northeast of the republic and borders with Kozlovsky District in the north, Tsivilsky District in the northwest, Yantikovsky District in the south, and with Kanashsky District in the west. The area of the district is 598.3 square kilometers (231.0 sq mi). Its administrative center is the urban locality (an urban-type settlement) of Urmary. Population: 25,189 (2010 Census); 28,189 (2002 Census); 29,868 (1989 Census). The population of Urmary accounts for 22.5% of the district's total population.