|Inhabitants:||575,600 (2004 est)|
|Pop. density:||24 inh./km²|
Champasak (or Champassak, Lao ຈໍາປາສັກ) is a province in the south-west Laos, at the boundary to Thailand and Cambodia. It is one of the three principalities that succeeded the Lao kingdom of Lan Xang. Population: 500,994 (2001 estimate).
The river Mekong flows through the province.
The Khmer ruins of Wat Phu are located here.