Progressive Constitutionalist Party was created in 1910.
Constitutionalist Liberal Party was created in 1968.
Progressive Constitutionalist Party ended in 1929.
Tudeh Party of Iran was created in 1941.
New Iran Party was created in 1964.
Communist Party of Iran was created in 1984.
Nation Party of Iran was created in 1951.
Labour Party of Iran was created in 1965.
Socialist Party - Iran - was created in 1921.
Worker-communist Party of Iran was created in 1991.
Modern Thinkers Party of Islamic Iran was created in 2006.
Worker-communism Unity Party of Iran was created in 2007.