Vientiane's 2025 population is now estimated at 755,941. In 1950, the population of Vientiane was 30,080. Vientiane has grown by 18,191 in the last year, which represents a 2.47% 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.