Vientiane's 2021 population is now estimated at 693,594. In 1950, the population of Vientiane was 30,080. Vientiane has grown by 11,052 since 2015, which represents a 1.62% 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 Vientiane, which typically includes Vientiane's population in addition to adjacent suburban areas.