Solnechnogorsk is a town and the administrative center of Solnechnogorsky District in Moscow Oblast, Russia, located on the …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 northwest from Moscow. Population: 52,944 ; 58,374 ; 55,554.