Peter Dudley Symon (13 August 1922 – 18 December 2008) was the General Secretary of the Communist Party of Australia between 1972 to 2008.
Mr Symon was a member of the Central Committee of the original Communist Party of Australia (formed in 1920, disbanded in 1991), and was one of the hundreds who either resigned or were expelled from that party in 1971. He was a foundation member of the newly created Socialist Party of Australia (SPA) formed in December that year and was elected General Secretary at its first Congress. He joined the CPA during the Spanish Civil War, age 16. He served in the army then air force during the second world war and then worked as a waterside labourer in Adelaide.
The SPA changed its name to the Communist Party of Australia at its 1996 Congress. Mr Symon's position as General Secretary was reconfirmed after the Party's 10th Congress in 2005.