Udomlya (Russian: Удомля) is a town and the administrative center of Udomelsky District of Tver Oblast, Russia, located 225 kilometers (140 mi) north of Tver, on the Rybinsk–Bologoye railway. Population: 31,061 (2010 Census); 31,961 (2002 Census); 30,751 (1989 Census).