Khammam's 2025 population is now estimated at 382,803. In 1950, the population of Khammam was 27,513. Khammam has grown by 8,975 in the last year, which represents a 2.4% 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 Khammam, which typically includes Khammam's population in addition to adjacent suburban areas.