Family name จำปาสัก (Champasak 
, Champassak 
, จำปาสัก) , in the entire world, is a rare cognomen. The cognomen จำปาสัก is habitual in Laos, where it is quite a rare surname, Thailand, where it is a very rare surname, and France. Measured by absolute frequency, it is commonest in Laos, Thailand, and the United States. Much less frequently, จำปาสัก is the forename as well as the last name.