Nyazepetrovsky District (Russian: Нязепетро́вский райо́н) is an administrative and municipal district (raion), one of the twenty-seven in Chelyabinsk Oblast, Russia. It is located in the northwest of the oblast. The area of the district is 3,459 square kilometers (1,336 sq mi). Its administrative center is the town of Nyazepetrovsk. Population: 18,261 (2010 Census); 21,527 (2002 Census); 27,767 (1989 Census). The population of Nyazepetrovsk accounts for 68.2% of the district's total population.