- Albania, Communist Party of Albania (11)
- Algeria, Algerian Party for Democracy and Socialism [PADS] (120)
- Argentina, Communist Party of Argentina (860)
- Armenia, Communist Party of Armenia (8)
- Australia, Communist Party of Australia (638)
- Austria, Communist Party of Austria (5)
- Austria, Party of Labour of Austria (98)
- Azerbaidjan,Communist Party of Azerbaidjan (3)
- Azerbaidjan,Communist Party of Azerbaidjan (43)
- Bahrain, Democratic Progressive Tribune (26)
- Bangladesh, Communist Party of Bangladesh (31)
- Bangladesh, Workers' Party of Bangladesh (7)
- Belarus, Communist Party of Belarus (6)
- Belgium, Communist Party of Belgium (45)
- Belgium, Workers' Party of Belgium (99)
- Bolivia, Communist Party of Bolivia (88)
- Brazil, Communist Party of Brazil (245)
- Brazil, Brazilian Communist Party (328)
- Britain, Communist Party of Britain (73)
- 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 (152)
- Chile, Communist Party of Chile (233)
- China, Communist Party of China (8)
- Colombia, FARC-EP (106)
- Colombia, Colombian Communist Party (73)
- Costa Rica, People's Vanguard Party (81)
- Croatia, Socialist Workers' Party of Croatia (21)
- Cuba, Communist Party of Cuba (119)
- Cyprus, Progressive Party of the Working People [AKEL] (877)
- Czech Republic, Communist Party of Bohemia and Moravia (131)
- Denmark, Communist Party in Denmark (70)
- Denmark, Communist Party of Denmark (18)
- Dominican Republic, Force of the Revolution (11)
- Ecuador, Communist Party of Ecuador (83)
- Egypt, Communist Party of Egypt (139)
- El Salvador, Communist Party of El Salvador (11)
- Estonia, Communist Party of Estonia (2)
- Finland, Communist Party of Finland (42)
- France, French Communist Party (84)
- FYROM, Communist Party of Macedonia (7)
- Georgia, Unified Communist Party of Georgia (29)
- Germany, German Communist Party (120)
- Greece, Communist Party of Greece (1502)
- Guyana, People's Progressive Party (10)
- Hungary, Hungarian Workers' Party (53)
- India, Communist Party of India (1041)
- India, Communist Party of India [Marxist] (1206)
- Iran, Tudeh Party of Iran (193)
- Iraq, Iraqi Communist Party (169)
- Iraq, Communist Party of Kurdistan- Iraq (40)
- Ireland, Communist Party of Ireland (259)
- Ireland, Workers' Party of Ireland (69)
- Israel, Communist Party of Israel (239)
- Italy, Italian Communist Party (27)
- Italy, Communist Party (Italy) (8)
- Italy, Communist Refoundation Party (418)
- Japan, Japanese Communist Party (387)
- Jordan, Jordanian Communist Party (14)
- Kazakhstan, Communist Party of Kazakhstan (2)
- Kazakhstan, Socialist Movement of Kazakhstan (25)
- Korea, Workers Party of Korea (469)
- Laos, Lao People Revolutionary Party (9)
- Latvia, Socialist Party of Latvia (16)
- Lebanon, Lebanese communist party (208)
- Lithuania, Socialist Party (20)
- Luxembourg, Communist Party of Luxembourg (51)
- Madagascar, Party of the Congress for the Independence of Madagascar [AKFM] (4)
- Malta, Communist Party of Malta (56)
- Mexico, Communist Party of Mexico (305)
- Mexico, Popular Socialist Party of Mexico (47)
- Mexico, Popular Socialist Party, Mexico (130)
- Moldova, Party of Communists of Republic of Moldova (1)
- Nepal, Communist Party of Nepal [UML] (7)
- Netherlands, New Communist Party of the Netherlands (61)
- Norway, Communist Party of Norway (42)
- Pakistan, Communist Party of Pakistan (212)
- Palestine, Palestinian Peoples' Party (33)
- Palestine, Palestinian Communist Party (179)
- Panama, Party of the People (45)
- Paraguay, Paraguayan Communist Party (209)
- Peru, Communist Party of Peru [Patria Roja] (11)
- Peru, Peruvian Communist Party (40)
- Philippines, Philippines Communist Party [PKP - 1930] (257)
- Poland, Communist Party of Poland (51)
- Portugal, Portuguese Communist Party (354)
- Romania, Romanian Communist Party (3)
- Romania, Romanian Socialist Party (5)
- Russia, Russian Communist Workers' Party (129)
- Russia, Communist Party of the Russian Federation (243)
- Russia, Communist Party of Soviet Union (41)
- Russia, Union of Communist Parties-Communist Party of the Soviet Union (22)
- Serbia, New Communist Party of Yugoslavia (140)
- Serbia, Party of the Communists of Serbia (19)
- Slovakia, Communist Party of Slovakia (8)
- South Africa, South African Communist Party (136)
- Spain, Communists of Catalonia (72)
- Spain, Communist Party of Spain (183)
- Spain, Communist party of the Peoples of Spain (209)
- Spain, Communist Party of the Workers of Spain (262)
- Sri Lanka, Communist Party of Sri Lanka (14)
- Sudan, Sudanese Communist Party (101)
- Swaziland, Communist Party of Swaziland (240)
- Sweden, Communist Party of Sweden (50)
- Syria, Syrian Communist Party (52)
- Syria, Syrian Communist Party (Unified) (33)
- Tadjikistan, Communist Party of Tadjikistan (1)
- Turkey, Communist Party of Turkey (334)
- Turkey, Labour Party [EMEP] (56)
- Ukraine, Communist Party of Ukraine (118)
- Ukraine, Union of Communists of Ukraine (10)
- Uruguay, Communist Party of Uruguay (87)
- USA, Communist Party USA (200)
- Venezuela, Communist Party of Venezuela (337)
- Vietnam, Communist Party of Vietnam (111)
- World Federation of Trade Unions (240)
- World Peace Council (62)