Leninsky District (Russian: Ле́нинский райо́н) is an administrative district (raion), one of the twenty-three in Tula Oblast, Russia. It is located in the northern central part of the oblast. The area of the district is 1,351.21 square kilometers (521.71 sq mi). Its administrative center is the rural locality (a settlement) of Leninsky. Population: 63,355 (2010 Census); 64,412 (2002 Census); 70,013 (1989 Census). The population of the administrative center accounts for 11.1% of the district's total population.