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′E﻿ / ﻿17.967°N 102.600°E﻿ / 17.967; 102.600Coordinates: 17°58′N 102°36′E﻿ / ﻿17.967°N 102.600°E﻿ / 17.967; 102.600 Country Laos Admin. division Vientiane Prefecture Settled 9th century[1] Area • Total 130 km2 (50 sq mi) Elevation 174 m (570 ft) Population (2015 Census) • Total 820,940[2] Time zone UTC+7 (ICT)