Belozersk is a town and the administrative center of Belozersky District in Vologda Oblast, Russia, located on the southern bank of Lake Beloye, from which it takes the name, northwest of Vologda, the administrative center of the oblast. Population:

Known as Beloozero (, lit. white lake) until 1777, it was first chronicled in 862 as one of the five original Russian towns (the other four being Murom, Novgorod, Polotsk, and Rostov). According to the Primary Chronicle, Sineus, a brother of Rurik, became the prince of Beloozero in 862. However, most likely Sineus never existed. On several occasions, the settlement was moved from one bank of the lake to another.