- Albania, Communist Party of Albania (11)
- Algeria, Algerian Party for Democracy and Socialism [PADS] (123)
- Argentina, Communist Party of Argentina (861)
- Armenia, Communist Party of Armenia (8)
- Australia, Communist Party of Australia (746)
- Austria, Communist Party of Austria (5)
- Austria, Party of Labour of Austria (140)
- Azerbaidjan,Communist Party of Azerbaidjan (6)
- Azerbaidjan,Communist Party of Azerbaidjan (44)
- Bahrain, Democratic Progressive Tribune (27)
- Bangladesh, Communist Party of Bangladesh (32)
- Bangladesh, Workers' Party of Bangladesh (8)
- Belarus, Communist Party of Belarus (7)
- Belgium, Communist Party of Belgium (55)
- Belgium, Workers' Party of Belgium (100)
- Bolivia, Communist Party of Bolivia (88)
- Brazil, Communist Party of Brazil (251)
- Brazil, Brazilian Communist Party (360)
- Britain, Communist Party of Britain (124)
- Britain, New Communist Party of Britain (22)
- Bulgaria, Communist Party of Bulgaria (6)
- Bulgaria, Party of the Bulgarian Communists (5)
- Canada, Communist Party of Canada (196)
- Chile, Communist Party of Chile (267)
- China, Communist Party of China (8)
- Colombia, FARC-EP (106)
- Colombia, Colombian Communist Party (75)
- Costa Rica, People's Vanguard Party (81)
- Croatia, Socialist Workers' Party of Croatia (23)
- Cuba, Communist Party of Cuba (123)
- Cyprus, Progressive Party of the Working People [AKEL] (882)
- Czech Republic, Communist Party of Bohemia and Moravia (134)
- Denmark, Communist Party in Denmark (73)
- Denmark, Communist Party of Denmark (22)
- Dominican Republic, Force of the Revolution (11)
- Ecuador, Communist Party of Ecuador (109)
- Egypt, Communist Party of Egypt (149)
- El Salvador, Communist Party of El Salvador (12)
- Estonia, Communist Party of Estonia (2)
- Finland, Communist Party of Finland (46)
- France, French Communist Party (85)
- FYROM, Communist Party of Macedonia (8)
- Georgia, Unified Communist Party of Georgia (31)
- Germany, German Communist Party (132)
- Greece, Communist Party of Greece (1830)
- Guyana, People's Progressive Party (10)
- Hungary, Hungarian Workers' Party (55)
- India, Communist Party of India (1252)
- India, Communist Party of India [Marxist] (1343)
- Iran, Tudeh Party of Iran (268)
- Iraq, Iraqi Communist Party (182)
- Iraq, Communist Party of Kurdistan- Iraq (42)
- Ireland, Communist Party of Ireland (332)
- Ireland, Workers' Party of Ireland (Official) (59)
- Ireland, Workers' Party of Ireland (122)
- Israel, Communist Party of Israel (246)
- Italy, Italian Communist Party (27)
- Italy, Communist Party (Italy) (13)
- Italy, Communist Refoundation Party (422)
- Japan, Japanese Communist Party (425)
- Jordan, Jordanian Communist Party (15)
- Kazakhstan, Communist Party of Kazakhstan (2)
- Kazakhstan, Socialist Movement of Kazakhstan (36)
- Kenya, Communist Party of Kenya (17)
- Kirgizia, Party of Communists of Kirgizia (1)
- Korea, Workers Party of Korea (689)
- Kuwait, Kuwaiti Progressive Movement (18)
- Laos, Lao People Revolutionary Party (10)
- Latvia, Socialist Party of Latvia (17)
- Lebanon, Lebanese communist party (215)
- Lithuania, Socialist Party (20)
- Luxembourg, Communist Party of Luxembourg (59)
- Madagascar, Party of the Congress for the Independence of Madagascar [AKFM] (5)
- Malta, Communist Party of Malta (57)
- Mexico, Communist Party of Mexico (361)
- Mexico, Popular Socialist Party of Mexico (69)
- Mexico, Popular Socialist Party, Mexico (136)
- Moldova, Party of Communists of Republic of Moldova (1)
- Nepal, Communist Party of Nepal [UML] (7)
- Netherlands, New Communist Party of the Netherlands (117)
- Norway, Communist Party of Norway (44)
- Pakistan, Communist Party of Pakistan (252)
- Palestine, Palestinian Peoples' Party (40)
- Palestine, Palestinian Communist Party (221)
- Panama, Party of the People (46)
- Paraguay, Paraguayan Communist Party (212)
- Peru, Communist Party of Peru [Patria Roja] (11)
- Peru, Peruvian Communist Party (41)
- Philippines, Philippines Communist Party [PKP - 1930] (264)
- Poland, Communist Party of Poland (54)
- Portugal, Portuguese Communist Party (385)
- Romania, Romanian Communist Party (3)
- Romania, Romanian Socialist Party (5)
- Russia, Russian Communist Workers' Party (174)
- Russia, Communist Party of the Russian Federation (268)
- Russia, Communist Party of Soviet Union (43)
- Russia, Union of Communist Parties-Communist Party of the Soviet Union (23)
- Serbia, New Communist Party of Yugoslavia (149)
- Serbia, Party of the Communists of Serbia (20)
- Slovakia, Communist Party of Slovakia (8)
- South Africa, South African Communist Party (316)
- Spain, Communists of Catalonia (84)
- Spain, Communist Party of Spain (197)
- Spain, Communist party of the Peoples of Spain (226)
- Spain, Communist Party of the Workers of Spain (296)
- Sri Lanka, Communist Party of Sri Lanka (22)
- Sudan, Sudanese Communist Party (122)
- Swaziland, Communist Party of Swaziland (300)
- Sweden, Communist Party of Sweden (62)
- Switzerland, Communist Party (36)
- Switzerland, Swiss Communist Party (5)
- Syria, Syrian Communist Party (54)
- Syria, Syrian Communist Party (Unified) (34)
- Tadjikistan, Communist Party of Tadjikistan (1)
- Turkey, Communist Party of Turkey (401)
- Turkey, Labour Party [EMEP] (56)
- Ukraine, Communist Party of Ukraine (119)
- Ukraine, Union of Communists of Ukraine (15)
- Uruguay, Communist Party of Uruguay (100)
- USA, Communist Party USA (213)
- Venezuela, Communist Party of Venezuela (496)
- Vietnam, Communist Party of Vietnam (144)
- World Federation of Trade Unions (249)
- World Peace Council (69)