Alatyrsky District (Russian: Ала́тырский райо́н; Chuvash: Улатăр районĕ) is an administrative and municipal district (raion), one of the twenty-one in the Chuvash Republic, Russia. It is located in the south of the republic. The area of the district is 1,940 square kilometers (750 sq mi). Its administrative center is the town of Alatyr (which is not administratively a part of the district). Population: 17,244 (2010 Census); 21,630 (2002 Census); 26,007 (1989 Census).