Prince Boun Oum (also Prince Boun Oum Na Champassak; Lao: ??????? ?? ???????; Thai: ??????? ? ???????????; RTGS: Bun-um Na Champasak; 12 December 1911 – 17 March 1980) was the son of King Ratsadanay, and was the hereditary prince of Champassak and also Prime Minister of the Kingdom of Laos from 1948–1950 and again in 1960–1962.