Kalininsky District (Russian: Кали́нинский райо́н) is an administrative and municipal district (raion), one of the thirty-six in Tver Oblast, Russia. It is located in the south of the oblast and borders with Likhoslavlsky District in the north, Rameshkovsky District in the northeast, Kimrsky District in the east, Konakovsky District in the southeast, Lotoshinsky District of Moscow Oblast in the south, Staritsky District in the southwest, and with Torzhoksky District in the west. The area of the district is 4,244.7 square kilometers (1,638.9 sq mi). Its administrative center is the city of Tver (which is not administratively a part of the district). Population: 52,047 (2010 Census); 54,857 (2002 Census); 58,330 (1989 Census).