Capital City in Vientiane Prefecture, Laos Vientiane ວຽງຈັນ • ວຽງຈັນທນ໌ Capital City Clockwise from top: Temple at That Luang, Haw Phra Kaew, That Dam, That Luang Stupa, Mekong Riverside, Patuxai, Wat Si Saket Vientiane Show map of Laos Vientiane Show map of Asia Coordinates: 17°58′N 102°36′Eufeff / ufeff17.967°N 102.600°Eufeff / 17.967; 102.600Coordinates: 17°58′N 102°36′Eufeff / ufeff17.967°N 102.600°Eufeff / 17.967; 102.600 Country Laos Admin.xa0division Vientiane Prefecture Settled 9th century[1] Area •xa0Total 130xa0km2 (50xa0sqxa0mi) Elevation 174xa0m (570xa0ft) Population (2015 Census) •xa0Total 820,940[2] Time zone UTC+7 (ICT)