Borisoglebsky is an urban locality and the administrative center of Borisoglebsky District of Yaroslavl Oblast, Russia, located on the Ustye River, 16 kilometers (9.9 mi) from Rostov and 77 kilometers (48 mi) southwest of Yaroslavl. Population: 5,646 (2010 census); 5,957 (2002 census); 6,327 (1989 Soviet census); 4,600 (1968).