Mexicali's 2021 population is now estimated at 1,140,298. In 1950, the population of Mexicali was 66,190. Mexicali has grown by 19,426 since 2015, which represents a 1.73% 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 Mexicali, which typically includes Mexicali's population in addition to adjacent suburban areas.