- Algeria, Algerian Party for Democracy and Socialism [PADS] (1)
- Argentina, Communist Party of Argentina (30)
- Australia, Communist Party of Australia (12)
- Austria, Communist Party of Austria (1)
- Austria, Party of Labour of Austria (1)
- Azerbaidjan,Communist Party of Azerbaidjan (1)
- Bangladesh, Communist Party of Bangladesh (2)
- Brazil, Communist Party of Brazil (1)
- Brazil, Brazilian Communist Party (8)
- Canada, Communist Party of Canada (2)
- Chile, Communist Party of Chile (3)
- Costa Rica, People's Vanguard Party (3)
- Cyprus, Progressive Party of the Working People [AKEL] (17)
- Denmark, Communist Party in Denmark (2)
- Dominican Republic, Force of the Revolution (1)
- Ecuador, Communist Party of Ecuador (5)
- Egypt, Communist Party of Egypt (3)
- Finland, Communist Party of Finland (1)
- France, French Communist Party (1)
- Greece, Communist Party of Greece (21)
- India, Communist Party of India (45)
- India, Communist Party of India [Marxist] (26)
- Iran, Tudeh Party of Iran (2)
- Iraq, Iraqi Communist Party (5)
- Ireland, Communist Party of Ireland (4)
- Israel, Communist Party of Israel (3)
- Italy, Communist Refoundation Party (5)
- Japan, Japanese Communist Party (13)
- Kazakhstan, Socialist Movement of Kazakhstan (1)
- Korea, Workers Party of Korea (28)
- Mexico, Communist Party of Mexico (4)
- Mexico, Popular Socialist Party, Mexico (5)
- Norway, Communist Party of Norway (2)
- Pakistan, Communist Party of Pakistan (2)
- Palestine, Palestinian Peoples' Party (2)
- Palestine, Palestinian Communist Party (4)
- Paraguay, Paraguayan Communist Party (2)
- Philippines, Philippines Communist Party [PKP - 1930] (2)
- Poland, Communist Party of Poland (1)
- Portugal, Portuguese Communist Party (2)
- Russia, Communist Party of the Russian Federation (1)
- Spain, Communist Party of Spain (2)
- Spain, Communist party of the Peoples of Spain (3)
- Spain, Communist Party of the Peoples of Spain (6)
- Sri Lanka, Communist Party of Sri Lanka (1)
- Swaziland, Communist Party of Swaziland (11)
- Sweden, Communist Party of Sweden (2)
- Turkey, Communist Party of Turkey (10)
- Turkey, Labour Party [EMEP] (1)
- Ukraine, Communist Party of Ukraine (6)
- Uruguay, Communist Party of Uruguay (1)
- USA, Communist Party USA (5)
- Venezuela, Communist Party of Venezuela (4)
- World Federation of Trade Unions (31)