Kamenka is a town and the administrative center of Kamensky District in Penza Oblast, Russia, located on the Atmis River 80 kilometers (50 mi) west of Penza, the administrative center of the oblast. Population: 39,577 (2010 census); 40,712 (2002 census); 27,235 (1989 Soviet census); 30,000 (1970).