Kismaayo's 2025 population is now estimated at 581,320. In 1950, the population of Kismaayo was 3,328. Kismaayo has grown by 23,771 in the last year, which represents a 4.26% 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 Kismaayo, which typically includes Kismaayo's population in addition to adjacent suburban areas.