- Albania, Communist Party of Albania (7)
- Algeria, Algerian Party for Democracy and Socialism [PADS] (109)
- Argentina, Communist Party of Argentina (775)
- Australia, Communist Party of Australia (450)
- Austria, Communist Party of Austria (2)
- Austria, Party of Labour of Austria (26)
- Azerbaidjan,Communist Party of Azerbaidjan (1)
- Azerbaidjan,Communist Party of Azerbaidjan (42)
- Bahrain, Democratic Progressive Tribune (14)
- Bangladesh, Communist Party of Bangladesh (19)
- Bangladesh, Workers' Party of Bangladesh (7)
- Belarus, Communist Party of Belarus (6)
- Belgium, Communist Party of Belgium (1)
- Belgium, Workers' Party of Belgium (89)
- Bolivia, Communist Party of Bolivia (86)
- Brazil, Communist Party of Brazil (196)
- Brazil, Brazilian Communist Party (309)
- Britain, Communist Party of Britain (34)
- Britain, New Communist Party of Britain (14)
- Bulgaria, Communist Party of Bulgaria (5)
- Bulgaria, Party of the Bulgarian Communists (4)
- Canada, Communist Party of Canada (74)
- Chile, Communist Party of Chile (185)
- China, Communist Party of China (6)
- Colombia, FARC-EP (106)
- Colombia, Colombian Communist Party (71)
- Costa Rica, People's Vanguard Party (81)
- Croatia, Socialist Workers' Party of Croatia (17)
- Cuba, Communist Party of Cuba (106)
- Cyprus, Progressive Party of the Working People [AKEL] (752)
- Czech Republic, Communist Party of Bohemia and Moravia (122)
- Denmark, Communist Party in Denmark (58)
- Denmark, Communist Party of Denmark (12)
- Dominican Republic, Force of the Revolution (11)
- Ecuador, Communist Party of Ecuador (44)
- Egypt, Communist Party of Egypt (111)
- El Salvador, Communist Party of El Salvador (2)
- Estonia, Communist Party of Estonia (1)
- Finland, Communist Party of Finland (32)
- France, French Communist Party (82)
- FYROM, Communist Party of Macedonia (5)
- Georgia, Unified Communist Party of Georgia (23)
- Germany, German Communist Party (78)
- Greece, Communist Party of Greece (1133)
- Guyana, People's Progressive Party (10)
- Hungary, Hungarian Workers' Party (40)
- India, Communist Party of India (675)
- India, Communist Party of India [Marxist] (908)
- Iran, Tudeh Party of Iran (129)
- Iraq, Iraqi Communist Party (103)
- Iraq, Communist Party of Kurdistan- Iraq (29)
- Ireland, Communist Party of Ireland (173)
- Ireland, Workers' Party of Ireland (38)
- Israel, Communist Party of Israel (226)
- Italy, Italian Communist Party (21)
- Italy, Communist Party (Italy) (3)
- Italy, Communist Refoundation Party (382)
- Japan, Japanese Communist Party (371)
- Jordan, Jordanian Communist Party (6)
- Kazakhstan, Communist Party of Kazakhstan (2)
- Kazakhstan, Socialist Movement of Kazakhstan (7)
- Korea, Workers Party of Korea (252)
- Laos, Lao People Revolutionary Party (4)
- Latvia, Socialist Party of Latvia (7)
- Lebanon, Lebanese communist party (192)
- Lithuania, Socialist People's Front (18)
- Luxembourg, Communist Party of Luxembourg (37)
- Madagascar, Party of the Congress for the Independence of Madagascar [AKFM] (4)
- Malta, Communist Party of Malta (52)
- Mexico, Communist Party of Mexico (209)
- Mexico, Popular Socialist Party of Mexico (35)
- Mexico, Popular Socialist Party, Mexico (125)
- Nepal, Communist Party of Nepal [UML] (5)
- Netherlands, New Communist Party of the Netherlands (18)
- Norway, Communist Party of Norway (29)
- Pakistan, Communist Party of Pakistan (153)
- Palestine, Palestinian Peoples' Party (24)
- Palestine, Palestinian Communist Party (110)
- Panama, Party of the People (40)
- Paraguay, Paraguayan Communist Party (152)
- Peru, Communist Party of Peru [Patria Roja] (10)
- Peru, Peruvian Communist Party (37)
- Philippines, Philippines Communist Party [PKP - 1930] (182)
- Poland, Communist Party of Poland (38)
- Portugal, Portuguese Communist Party (259)
- Romania, Romanian Communist Party (2)
- Romania, Romanian Socialist Party (3)
- Russia, Communist Workers' Party of Russia - Revolutionary Party of Communists (96)
- Russia, Communist Party of the Russian Federation (167)
- Russia, Communist Party of Soviet Union (37)
- Russia, Union of Communist Parties-Communist Party of the Soviet Union (14)
- Serbia, New Communist Party of Yugoslavia (102)
- Serbia, Party of the Communists of Serbia (12)
- Slovakia, Communist Party of Slovakia (2)
- South Africa, South African Communist Party (37)
- Spain, Communists of Catalonia (58)
- Spain, Communist Party of Spain (127)
- Spain, Communist party of the Peoples of Spain (182)
- Spain, Communist Party of the Peoples of Spain (196)
- Sri Lanka, Communist Party of Sri Lanka (10)
- Sudan, Sudanese Communist Party (57)
- Swaziland, Communist Party of Swaziland (88)
- Sweden, Communist Party of Sweden (28)
- Syria, Syrian Communist Party (43)
- Syria, Syrian Communist Party (Unified) (24)
- Tadjikistan, Communist Party of Tadjikistan (1)
- Turkey, Communist Party of Turkey (198)
- Turkey, Labour Party [EMEP] (51)
- Ukraine, Communist Party of Ukraine (101)
- Ukraine, Union of Communists of Ukraine (6)
- Uruguay, Communist Party of Uruguay (69)
- USA, Communist Party USA (155)
- Venezuela, Communist Party of Venezuela (227)
- Vietnam, Communist Party of Vietnam (74)
- World Federation of Trade Unions (226)
- World Peace Council (58)