Thongsing Thammavong (Lao: ທອງສິງ ທຳມະວົງ; born 12 April 1944) is a Laotian politician. He was the Prime Minister of Laos from 2010 to 2016. He is a member of the Lao People's Revolutionary Party (LPRP). He has been a member of the LPRP Politburo since 1991. He was the President of the National Assembly from 2006 to 2010.