Hosur's 2025 population is now estimated at 646,438. In 1950, the population of Hosur was 8,540. Hosur has grown by 25,116 in the last year, which represents a 4.04% 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 Hosur, which typically includes Hosur's population in addition to adjacent suburban areas.