18 IMCWP, List of Participants
- Algerian Democratic and Socialist Party
- Communist Party of Argentina
- Party of Labour of Austria
- Communist Party of Australia
- Workers Party of Bangladesh
- Communist Party of Belarus
- Workers' Party of Belgium
- Brazilian Communist Party
- Communist Party of Brazil
- Communist Party of Britain
- Communist Party of Canada
- Communist Party of Chile
- Communist Party of China
- Communist Party of Cuba
- AKEL
- Communist Party of Bohemia and Moravia
- Communist Party in Denmark
- Communist Party of Denmark
- Communist Party of Ecuador
- French Communist Party
- Communist Party of Finland
- German Communisty Party
- Communist Party of Greece
- the People's Progressive Party of Guyana
- Hungarian Workers' Party
- Communist Party of India
- Communist Party of India (Marxist)
- Tudeh Party of Iran
- Iraqi Communist Party
- Communist Party of Ireland
- Workers Party of Ireland
- Communist Party of Israel
- Jordanian Communist Party
- Workers' Party of Korea
- Lao People's Revolutionary Party
- Lebanese Communist Party
- Communist Party of Nepal (CPN-UML)
- Communist Party of Norway
- Communist Party of Pakistan
- Palestinian Communist Party
- The Palestinian Peoples Party
- Philippine Communist Party (PKP-1930)
- Portuguese Communist Party
- Communist Party of Russian Federation (KPRF)
- Russian Communist Workers' Party
- Communist Party of Soviet Union (CPSU)
- New Communist Party of Yugoslavia
- South African Communist Party
- Communist Party of Spain
- Communist Party of the Peoples of Spain
- Communist Party of Sri Lanka
- Communist Party of Sweden
- Communist Party, Turkey
- Communist Party of Ukraine
- Communist Party USA
- Communist Party of Venezuela
- Communist Party of Vietnam