Solnechnogorsk is a town and the administrative center of Solnechnogorsky District in Moscow Oblast, Russia, located on the Moscow–St. Petersburg Highway and the Moscow–St. Petersburg railway, on the coast of Senezh Lake, 65 kilometers (40 mi) northwest from Moscow. Population: 52,944 (2010 census); 58,374 (2002 census); 55,554 (1989 Soviet census).