Houston's 2021 population is now estimated at 6,490,749. In 1950, the population of Houston was 709,058. Houston has grown by 120,045 since 2015, which represents a 1.88% 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 Houston, which typically includes Houston's population in addition to adjacent suburban areas.