Angarsk is a city and the administrative center of Angarsky District of Irkutsk Oblast, Russia, located on the Kitoy River, 51 kilometers (32 mi) from Irkutsk, the administrative center of the oblast. Population: 221,296 (2021 census); 233,567 (2010 census); 247,118 (2002 census); 265,835 (1989 Soviet census).