Merca's 2026 population is now estimated at 863,517. In 1950, the population of Merca was 30,738. Merca has grown by 35,509 in the last year, which represents a 4.29% 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 Merca, which typically includes Merca's population in addition to adjacent suburban areas.