Kyshtym (Russian:Кышты́м) is a town in Chelyabinsk Oblast, Russia, located on the eastern slopes of the Southern Ural Mountains 90 kilometers (56mi) northwest of Chelyabinsk, near the town of Ozyorsk. Population: 38,942(2010 Census);41,929(2002 Census);42,852(**** Census); 36,000 (1970).