Yershov (Russian: Ершо́в) is a town and the administrative center of Yershovsky District in Saratov Oblast, Russia, located in the upper streams of the Maly Uzen River, 178 kilometers (111 mi) east of Saratov, the administrative center of the oblast. Population: 21,448 (2010 Census); 23,848 (2002 Census); 24,468 (1989 Census).