Heng Samrin (Khmer: ហេង សំរិន; born 25 May 1934) is the President of the National Assembly of Cambodia, Honorary President of the Cambodian People's Party, and a Member of Parliament for Kampong Cham Province. He previously served as the de facto leader of the Hanoi-backed People's Republic of Kampuchea from 1979 to 1981 and General Secretary of the Kampuchean People's Revolutionary Party from 1981 to 1991. Heng Samrin is Cambodia's oldest parliamentarian, at 81 years of age.