Rostov On Don's 2021 population is now estimated at 1,137,147. In 1950, the population of Rostov On Don was 484,402. Rostov On Don has grown by 946 since 2015, which represents a 0.08% annual change. These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Rostov On Don, which typically includes Rostov On Don's population in addition to adjacent suburban areas.