- Algeria, Algerian Party for Democracy and Socialism [PADS] (2)
- Argentina, Communist Party of Argentina (50)
- Australia, Communist Party of Australia (21)
- 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 (5)
- Brazil, Brazilian Communist Party (8)
- Bulgaria, Communist Party of Bulgaria (1)
- Canada, Communist Party of Canada (2)
- Chile, Communist Party of Chile (4)
- Costa Rica, People's Vanguard Party (3)
- Cyprus, Progressive Party of the Working People [AKEL] (38)
- Czech Republic, Communist Party of Bohemia and Moravia (1)
- Denmark, Communist Party in Denmark (2)
- Dominican Republic, Force of the Revolution (3)
- Ecuador, Communist Party of Ecuador (7)
- Egypt, Communist Party of Egypt (5)
- Finland, Communist Party of Finland (2)
- France, French Communist Party (1)
- FYROM, Communist Party of Macedonia (1)
- Germany, German Communist Party (2)
- Greece, Communist Party of Greece (39)
- Hungary, Hungarian Workers' Party (1)
- India, Communist Party of India (76)
- India, Communist Party of India [Marxist] (38)
- Iran, Tudeh Party of Iran (6)
- Iraq, Iraqi Communist Party (6)
- Ireland, Communist Party of Ireland (5)
- Israel, Communist Party of Israel (3)
- Italy, Italian Communist Party (1)
- Italy, Communist Party (Italy) (1)
- Italy, Communist Refoundation Party (7)
- Japan, Japanese Communist Party (20)
- Kazakhstan, Socialist Movement of Kazakhstan (1)
- Korea, Workers Party of Korea (40)
- Malta, Communist Party of Malta (2)
- Mexico, Communist Party of Mexico (5)
- Mexico, Popular Socialist Party, Mexico (9)
- Norway, Communist Party of Norway (2)
- Pakistan, Communist Party of Pakistan (2)
- Palestine, Palestinian Peoples' Party (3)
- Palestine, Palestinian Communist Party (4)
- Panama, Party of the People (1)
- Paraguay, Paraguayan Communist Party (3)
- Philippines, Philippines Communist Party [PKP - 1930] (2)
- Poland, Communist Party of Poland (1)
- Portugal, Portuguese Communist Party (4)
- Russia, Communist Workers' Party of Russia - Revolutionary Party of Communists (1)
- 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 (22)
- Sweden, Communist Party of Sweden (3)
- Syria, Syrian Communist Party (1)
- Turkey, Communist Party of Turkey (11)
- Turkey, Labour Party [EMEP] (2)
- Ukraine, Communist Party of Ukraine (9)
- Uruguay, Communist Party of Uruguay (1)
- USA, Communist Party USA (5)
- Venezuela, Communist Party of Venezuela (7)
- Vietnam, Communist Party of Vietnam (1)
- World Federation of Trade Unions (47)