Karur's 2025 population is now estimated at 405,879. In 1950, the population of Karur was 40,980. Karur has grown by 11,160 in the last year, which represents a 2.83% 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 Karur, which typically includes Karur's population in addition to adjacent suburban areas.