- Albania, Communist Party of Albania (9)
- Algeria, Algerian Party for Democracy and Socialism [PADS] (112)
- Argentina, Communist Party of Argentina (856)
- Armenia, Communist Party of Armenia (4)
- Australia, Communist Party of Australia (515)
- Austria, Communist Party of Austria (2)
- Austria, Party of Labour of Austria (66)
- Azerbaidjan,Communist Party of Azerbaidjan (2)
- Azerbaidjan,Communist Party of Azerbaidjan (42)
- Bahrain, Democratic Progressive Tribune (19)
- Bangladesh, Communist Party of Bangladesh (27)
- Bangladesh, Workers' Party of Bangladesh (7)
- Belarus, Communist Party of Belarus (6)
- Belgium, Communist Party of Belgium (18)
- Belgium, Workers' Party of Belgium (90)
- Bolivia, Communist Party of Bolivia (86)
- Brazil, Communist Party of Brazil (207)
- Brazil, Brazilian Communist Party (319)
- Britain, Communist Party of Britain (44)
- 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 (116)
- Chile, Communist Party of Chile (207)
- China, Communist Party of China (6)
- Colombia, FARC-EP (106)
- Colombia, Colombian Communist Party (72)
- Costa Rica, People's Vanguard Party (81)
- Croatia, Socialist Workers' Party of Croatia (18)
- Cuba, Communist Party of Cuba (107)
- Cyprus, Progressive Party of the Working People [AKEL] (865)
- Czech Republic, Communist Party of Bohemia and Moravia (123)
- Denmark, Communist Party in Denmark (61)
- Denmark, Communist Party of Denmark (13)
- Dominican Republic, Force of the Revolution (11)
- Ecuador, Communist Party of Ecuador (63)
- Egypt, Communist Party of Egypt (129)
- El Salvador, Communist Party of El Salvador (10)
- Estonia, Communist Party of Estonia (1)
- Finland, Communist Party of Finland (34)
- France, French Communist Party (83)
- FYROM, Communist Party of Macedonia (6)
- Georgia, Unified Communist Party of Georgia (26)
- Germany, German Communist Party (96)
- Greece, Communist Party of Greece (1290)
- Guyana, People's Progressive Party (10)
- Hungary, Hungarian Workers' Party (46)
- India, Communist Party of India (879)
- India, Communist Party of India [Marxist] (1092)
- Iran, Tudeh Party of Iran (159)
- Iraq, Iraqi Communist Party (137)
- Iraq, Communist Party of Kurdistan- Iraq (33)
- Ireland, Communist Party of Ireland (203)
- Ireland, Workers' Party of Ireland (48)
- Israel, Communist Party of Israel (232)
- Italy, Italian Communist Party (27)
- Italy, Communist Party (Italy) (5)
- Italy, Communist Refoundation Party (393)
- Japan, Japanese Communist Party (373)
- Jordan, Jordanian Communist Party (7)
- Kazakhstan, Communist Party of Kazakhstan (2)
- Kazakhstan, Socialist Movement of Kazakhstan (11)
- Korea, Workers Party of Korea (322)
- Laos, Lao People Revolutionary Party (5)
- Latvia, Socialist Party of Latvia (8)
- Lebanon, Lebanese communist party (197)
- Lithuania, Socialist Party (19)
- Luxembourg, Communist Party of Luxembourg (40)
- Madagascar, Party of the Congress for the Independence of Madagascar [AKFM] (4)
- Malta, Communist Party of Malta (52)
- Mexico, Communist Party of Mexico (243)
- Mexico, Popular Socialist Party of Mexico (37)
- Mexico, Popular Socialist Party, Mexico (126)
- Nepal, Communist Party of Nepal [UML] (6)
- Netherlands, New Communist Party of the Netherlands (28)
- Norway, Communist Party of Norway (32)
- Pakistan, Communist Party of Pakistan (172)
- Palestine, Palestinian Peoples' Party (28)
- Palestine, Palestinian Communist Party (141)
- Panama, Party of the People (45)
- Paraguay, Paraguayan Communist Party (179)
- Peru, Communist Party of Peru [Patria Roja] (10)
- Peru, Peruvian Communist Party (37)
- Philippines, Philippines Communist Party [PKP - 1930] (214)
- Poland, Communist Party of Poland (46)
- Portugal, Portuguese Communist Party (316)
- Romania, Romanian Communist Party (2)
- Romania, Romanian Socialist Party (3)
- Russia, Communist Workers' Party of Russia - Revolutionary Party of Communists (103)
- Russia, Communist Party of the Russian Federation (185)
- Russia, Communist Party of Soviet Union (39)
- Russia, Union of Communist Parties-Communist Party of the Soviet Union (18)
- Serbia, New Communist Party of Yugoslavia (129)
- Serbia, Party of the Communists of Serbia (17)
- Slovakia, Communist Party of Slovakia (3)
- South Africa, South African Communist Party (38)
- Spain, Communists of Catalonia (64)
- Spain, Communist Party of Spain (160)
- Spain, Communist party of the Peoples of Spain (196)
- Spain, Communist Party of the Workers of Spain (235)
- Sri Lanka, Communist Party of Sri Lanka (12)
- Sudan, Sudanese Communist Party (77)
- Swaziland, Communist Party of Swaziland (138)
- Sweden, Communist Party of Sweden (33)
- Syria, Syrian Communist Party (44)
- Syria, Syrian Communist Party (Unified) (29)
- Tadjikistan, Communist Party of Tadjikistan (1)
- Turkey, Communist Party of Turkey (272)
- Turkey, Labour Party [EMEP] (52)
- Ukraine, Communist Party of Ukraine (114)
- Ukraine, Union of Communists of Ukraine (6)
- Uruguay, Communist Party of Uruguay (82)
- USA, Communist Party USA (179)
- Venezuela, Communist Party of Venezuela (282)
- Vietnam, Communist Party of Vietnam (81)
- World Federation of Trade Unions (239)
- World Peace Council (62)