Arak's 2021 population is now estimated at 559,300. In 1950, the population of Arak was 52,020. Arak has grown by 8,294 since 2015, which represents a 1.51% 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 Arak, which typically includes Arak's population in addition to adjacent suburban areas.