Say Chhum (Khmer: សាយ ឈុំ; born 5 February 1945) is a Cambodian politician who has been the president of the Senate of Cambodia since 2015. He was the first vice president of the Senate until June 2015, when he succeeded Chea Sim upon the latter's death. He served as the Chairman of the Permanent Committee of the Central Committee of the Cambodian People's Party. He was elected to represent Kampong Speu Province in the National Assembly in 2003. He also served as Second Vice-President of the National Assembly. His son, Say Sam Al, was appointed Minister of the Environment in 2013.