Country | Party | Ideology | Date of establishment | Date of dissolution | Duration | Continent |
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Republic of Afghanistan | National Revolutionary Party | Pashtun nationalism, Pashtunization, Republicanism, Secularism | 14 February 1977 | 28 April 1978 | 1 year, 73 days | Asia |
Democratic Republic of Afghanistan | People's Democratic Party of Afghanistan-Khalq | Communism, Marxism–Leninism, Stalinism, Pashtun nationalism, Anti-imperialism | 30 April 1978 | 24 December 1979 | 1 year, 238 days | Asia |
Democratic Republic of Afghanistan/Republic of Afghanistan | People's Democratic Party of Afghanistan-Parcham (National Fatherland Front) | Communism (until 1990), Marxism–Leninism (until 1990), Afghan nationalism, Anti-imperialism | 24 December 1979 | 28 July 1992 | 12 years, 217 days | Asia |
Albanian Kingdom | Albanian Fascist Party | Albanian nationalism, Greater Albania, Fascism, Italophilia, Serbophobia, Hellenophobia | 2 June 1939 | 27 July 1943 | 4 years, 55 days | Europe |
Albanian Kingdom | Guard of Greater Albania | Albanian nationalism, Fascism | 27 July 1943 | 8 September 1943 | 43 days | Europe |
Albanian Kingdom | National Front | Albanian nationalism, Greater Albania, Anti-communism, Republicanism, Big tent, Agrarian socialism | 14 September 1943 | 29 November 1943 | 76 days | Europe |
Democratic Government of Albania | Party of Labour of Albania (National Liberation Movement) | Communism, Marxism–Leninism, Hoxhaism, Anti-revisionism | 20 October 1944 | 5 August 1945 | 289 days | Europe |
Democratic Government of Albania | Party of Labour of Albania (Democratic Front) | 5 August 1945 | 11 January 1946 | 159 days | Europe |
Albania | 11 January 1946 | 11 December 1990 | 44 years, 334 days | Europe |
Algeria | National Liberation Front | Arab socialism, Algerian nationalism, Pan-Arabism, Anti-imperialism | 3 July 1962 | 23 February 1989 | 26 years, 235 days | Africa |
People's Republic of Angola | People's Movement for the Liberation of Angola | Communism, Left-wing nationalism, Marxism–Leninism | 11 November 1975 | 30 May 1991 | 15 years, 200 days | Africa |
Armenia | Communist Party of Armenia | Communism, Marxism–Leninism, democratic centralism, state socialism | 2 December 1920 | 30 December 1922 | 2 years, 28 days | Asia |
Transcaucasia | Communist Party of Armenia | Communism, Marxism–Leninism, democratic centralism, state socialism | 12 March 1922 | 30 December 1922 | 293 days | Asia |
Federal State of Austria | Fatherland Front | Clerical fascism | 1 May 1934 | 13 March 1938 | 3 years, 316 days | Europe |
Azerbaijan | Azerbaijan Communist Party | Communism, Marxism–Leninism, democratic centralism, state socialism | 30 April 1920 | 30 December 1922 | 2 years, 244 days | Asia |
Transcaucasia | Azerbaijan Communist Party | Communism, Marxism–Leninism, democratic centralism, state socialism | 12 March 1922 | 30 December 1922 | 293 days | Asia |
Bangladesh | Bangladesh Krishak Sramik Awami League | Mujibism, Bengali nationalism, Socialism | 24 January 1975 | 15 August 1975 | 203 days | Asia |
Bangladesh | Jatiya Party | Bangladeshi nationalism, Conservatism, Authoritarianism, Militarism | 11 March 1988 | 6 December 1990 | 2 years, 270 days | Asia |
Dahomey | Dahomeyan Democratic Party | African nationalism | 15 December 1963 | 4 December 1965 | 1 year, 354 days | Africa |
Benin | People's Revolutionary Party of Benin | Communism, Marxism–Leninism (nominally) | 30 November 1975 | 1 March 1990 | 14 years, 91 days | Africa |
Protectorate of Bohemia and Moravia | National Partnership | Collaborationism, Nazism | 6 April 1939 | 9 May 1945 | 6 years, 33 days | Europe |
Bulgaria | Bulgarian Communist Party (Fatherland Front) | Communism, Marxism–Leninism, democratic centralism, state socialism | 15 September 1946 | 15 January 1990 | 43 years, 122 days | Europe |
State of Burma | Dobama Sinyetha Asi Ayon | | 1943 | 1944 | 1 year, 0 days | Asia |
State of Burma | Maha Bama Asi Ayon | | 1944 | 1945 | 1 year, 0 days | Asia |
Burma | Burma Socialist Programme Party | Burmese Way to Socialism | 2 March 1962 | 18 September 1988 | 26 years, 200 days | Asia |
Republic of Burundi | Union for National Progress | Burundian nationalism, Tutsi interests | 11 July 1974 | 13 March 1992 | 17 years, 246 days | Africa |
Byelorussia | Communist Party of Byelorussia | Communism, Marxism–Leninism, democratic centralism, state socialism | 31 July 1920 | 30 December 1922 | 2 years, 152 days | Europe |
Cambodia (Sangkum era) | Sangkum | Khmer nationalism, National conservatism, Royalism, Statism, Buddhist socialism, Economic nationalism | 22 March 1955 | 18 March 1970 | 14 years, 361 days | Asia |
Kampuchea | Kampuchean People's Revolutionary Party | Communism, Socialism, Marxism–Leninism, Revisionism, Left-wing nationalism | 7 January 1979 | 1 May 1989 | 10 years, 114 days | Asia |
Republic of Cameroon | Cameroonian National Union | Big tent | 1 September 1966 | 24 March 1985 | 18 years, 204 days | Africa |
Cameroon | Cameroon People's Democratic Movement | Big tent, Nationalism, Francophilia | 1975 | 1990 | 15 years, 0 days | Africa |
Cape Verde | African Party for the Independence of Guinea and Cape Verde | Communism, Marxism–Leninism | 1 July 1975 | 20 January 1981 | 5 years, 203 days | Africa |
Cape Verde | African Party for the Independence of Cape Verde | Communism, Marxism–Leninism | 20 January 1981 | 28 September 1990 | 9 years, 251 days | Africa |
Carpatho-Ukraine | Ukrainian National Union [uk] | Nationalism | 18 January 1939 | March 1939 | 60 days | Europe |
Central African Republic | Movement for the Social Evolution of Black Africa | African nationalism, Anti-colonialism, Progressivism, Anti-imperialism | 1962 | 1980 | 18 years, 0 days | Africa |
Central African Republic | Central African Democratic Union | African nationalism, Republicanism | 1 March 1980 | 2 September 1981 | 1 year, 185 days | Africa |
Central African Republic | Central African Democratic Rally | African nationalism, Democratic socialism, Social democracy, Republicanism | 6 February 1987 | 22 April 1991 | 4 years, 75 days | Africa |
Chad | Chadian Progressive Party | African nationalism, Pan-Africanism, Anti-imperialism, African socialism, Federalism | 16 April 1962 | 6 April 1973 | 10 years, 355 days | Africa |
Chad | National Movement for the Cultural and Social Revolution | African nationalism, Pan-Africanism, Anti-imperialism, African socialism, Federalism | 6 April 1973 | 13 April 1975 | 2 years, 7 days | Africa |
Chad | National Union for Independence and Revolution | Nationalism | 24 June 1984 | 3 December 1990 | 6 years, 162 days | Africa |
Guangzhou | Chinese Communist Party | Marxism–Leninism, Mao Zedong Thought, Chinese communism | 1927 | 1927 | | Asia |
Hunan | Chinese Communist Party | Marxism–Leninism, Mao Zedong Thought, Chinese communism | 1927 | 1927 | | Asia |
Jinggang | Chinese Communist Party | Marxism–Leninism, Mao Zedong Thought, Chinese communism | 1927 | 1928 | 1 year, 0 days | Asia |
Southwest Jiangxi | Chinese Communist Party | Marxism–Leninism, Mao Zedong Thought, Chinese communism | 1930 | 1931 | 1 year, 0 days | Asia |
Chinese Soviet Republic | Chinese Communist Party | Marxism–Leninism, Mao Zedong Thought, Chinese communism | 7 November 1931 | 22 September 1937 | 5 years, 319 days | Asia |
Xinjiang | People's Anti-Imperialist Association | Six Great Policies | 1 August 1935 | 1 April 1942 | 6 years, 243 days | Asia |
Republic of China/Taiwan | Kuomintang | Tridemism | 1 July 1925 | 15 July 1987 | 62 years, 14 days | Asia |
Yan'an | Chinese Communist Party | Marxism–Leninism, Mao Zedong Thought, Chinese communism | 1937 | 1949 | 12 years, 0 days | Asia |
Comoros | Comorian Union for Progress | Nationalism | 1982 | 1990 | 8 years, 0 days | Africa |
People's Republic of the Congo | Congolese Party of Labour | Communism, Marxism–Leninism | 31 January 1969 | 18 March 1992 | 23 years, 47 days | Africa |
Tinoquista Costa Rica | Peliquista Party | Nationalism, Personalism, Authoritarianism | 27 January 1917 | 12 August 1919 | 2 years, 197 days | North America |
Czechoslovakia | Communist Party of Czechoslovakia (National Front) | Marxism–Leninism, democratic centralism, state socialism, Husakism | 25 February 1948 | 30 November 1989 | 41 years, 278 days | Europe |
Dahomey | Dahomeyan Unity Party | African nationalism, Republicanism | 11 April 1961 | 13 November 1963 | 2 years, 216 days | Africa |
Danzig | Nazi Party | Nazism | 21 October 1937 | 1 September 1939 | 1 year, 315 days | Europe |
Djibouti | People's Rally for Progress | Issa interests | 1 October 1981 | 4 September 1992 | 10 years, 339 days | Africa |
Dominican Republic | Dominican Party | Trujillism, National conservatism, Right-wing populism, Antihaitianismo | 2 August 1931 | 28 December 1961 | 30 years, 148 days | North America |
East Germany | Socialist Unity Party of Germany (Democratic Bloc) | Communism, Marxism–Leninism, democratic centralism, state socialism | 7 October 1949 | 30 March 1950 | 174 days | Europe |
East Germany | Socialist Unity Party of Germany (National Front of the German Democratic Republic) | Communism, Marxism–Leninism, democratic centralism, state socialism | 30 March 1950 | 1 December 1989 | 39 years, 246 days | Europe |
Egypt | Liberation Rally | Egyptian nationalism, Pan-Arabism, Socialism | 10 February 1953 | 1957 | 4 years, 0 days | Africa |
Egypt | National Union | Nasserism, Pan-Arabism, Socialism | 1957 | 1962 | 5 years, 0 days | Africa |
Egypt | Arab Socialist Union | Arab nationalism, Arab socialism, Pan-Arabism, Nasserism | 1961 | 1976 | 15 years, 0 days | Africa |
Egypt | National Democratic Party | Egyptian nationalism, Big-Tent, Neo-liberalism | 1976 | 2011 | 35 years, 0 days | Africa |
El Salvador | National Pro Patria Party | Fascism, Anti-communism, Conservatism, Agrarian oligarchy | 1933 | 1944 | 11 years, 0 days | Central America |
Equatorial Guinea | United National Workers' Party | African nationalism, Personalism, Anti-imperialism, Anti-colonialism, Anti-racism, Pan-Africanism, Anti-intellectualism, Totalitarianism | 7 July 1970 | 25 August 1979 | 9 years, 49 days | Africa |
Equatorial Guinea | Democratic Party of Equatorial Guinea | African nationalism, Militarism | 11 October 1987 | 16 November 1991 | 4 years, 36 days | Africa |
Eritrea | Eritrean People's Liberation Front | Left-wing nationalism | 1991 (Provisional government) 1993 (Recognized state) | 16 February 1994 | 3 years, 0 days | Africa |
Estonia | Patriotic League (National Front for the Implementation of the Constitution) | Estonian nationalism, Personalism | 9 March 1935 | 21 July 1940 | 5 years, 134 days | Europe |
Estonia | Communist Party of Estonia | Communism, Marxism–Leninism, democratic centralism, state socialism | 21 July 1940 | 9 August 1940 | 19 days | Europe |
Ethiopia | Commission for Organizing the Party of the Working People of Ethiopia | Communism, Marxism–Leninism | 12 September 1984 | 22 February 1987 | 2 years, 163 days | Africa |
Ethiopia | Workers' Party of Ethiopia | Communism, Marxism–Leninism | 22 February 1987 | 28 April 1991 | 4 years, 65 days | Africa |
Gabon | Gabonese Democratic Party | Conservatism | 12 March 1968 | 22 May 1990 | 22 years, 71 days | Africa |
Georgia | Communist Party of Georgia | Communism, Marxism–Leninism, democratic centralism, state socialism | 25 February 1921 | 30 December 1922 | 1 year, 308 days | Asia |
Transcaucasia | Communist Party of Georgia | Communism, Marxism–Leninism, democratic centralism, state socialism | 12 March 1922 | 30 December 1922 | 293 days | Asia |
Nazi Germany | National Socialist German Workers' Party | Nazism | 14 July 1933 | 23 May 1945 | 11 years, 313 days | Europe |
Reich Commissariat for the Occupied Dutch Territories | National Socialist Movement in the Netherlands | Collaborationism, Dutch irredentism, Dutch nationalism and Nazism | 14 December 1941 | 6 May 1945 | 3 years, 143 days | Europe |
Ghana | Convention People's Party | Nkrumaism, African socialism, African nationalism, Pan-Africanism | 31 January 1964 | 24 February 1966 | 2 years, 24 days | Africa |
Grenada | New Jewel Movement | Communism, Marxism–Leninism | 13 March 1979 | 25 October 1983 | 4 years, 226 days | North America |
Guatemala | Progressive Liberal Party | Ubicoism, Liberalism, Nationalism, Anti-communism | 1931 | 1944 | | Central America |
Guinea | Democratic Party of Guinea – African Democratic Rally | African nationalism, African socialism, Pan-Africanism | 1960 | 1984 | | Africa |
Guinea-Bissau | African Party for the Independence of Guinea and Cape Verde | Communism, Marxism–Leninism | 1974 | 1991 | | Africa |
Haiti | National Unity Party | Black nationalism, Haitian nationalism, Right-wing populism, Anti-communism, Anti-Americanism | 14 June 1957 | 22 July 1985 | 28 years, 38 days | North America |
Hawaii | Reform Party | Americanisation, Annexationism | 4 July 1894 | 12 August 1898 | 4 years, 39 days | North America |
Government of National Unity | Arrow Cross Party | Hungarism, Fascism, Collaborationism, Agrarianism | 16 October 1944 | 7 May 1945 | 203 days | Europe |
Hungary | Hungarian Working People's Party | Communism, Marxism–Leninism, Stalinism | 20 August 1949 | 31 October 1956 | 7 years, 72 days | Europe |
Hungary | Hungarian Socialist Workers' Party | Communism, Marxism–Leninism, Kádárism | 31 October 1956 | 16 October 1989 | 32 years, 350 days | Europe |
Indonesia | Indonesian National Party | Nationalism, Marhaenism | 17 August 1945 | 3 November 1945 | 78 days | Asia |
Imperial State of Iran | Rastakhiz Party | Monarchism, Populism, Secularism, Democratic centralism, Third Position | 2 March 1975 | 1 November 1978 | 3 years, 244 days | Asia |
Iran | Islamic Republican Party | Velyât-e Faqih, Anti-imperialism, Iranian nationalism, Shi'ite Islamism, Anti-Monarchism, Anti-Americanism, Anti-communism, Anti-Sovietism, Anti-Zionism, Islamic fundamentalism, Homophobia, Anti-Western sentiment | 1981 | 1987 | | Asia |
Iraq | Iraqi Arab Socialist Union | Arab nationalism, Arab socialism, Pan-Arabism, Nasserism | 1964 | 1968 | | Asia |
Iraq | Arab Socialist Ba'ath Party (National Progressive Front) | Saddamist Ba'athism | 1968 | 2003 | | Asia |
Kingdom of Italy | National Fascist Party | Fascism, Corporatism, Ultranationalism, Totalitarianism | 17 May 1928 | 27 July 1943 | | Europe |
Italian Social Republic | Republican Fascist Party | Fascism, Corporatism, Ultranationalism, Totalitarianism, Antisemitism, Collaborationism | 13 September 1943 | 28 April 1945 | | Europe |
Ivory Coast | Democratic Party of Ivory Coast – African Democratic Rally | African nationalism, Conservatism, Populism, Houphouëtism, Pan-Africanism | 1960 | 1990 | | Africa |
Empire of Japan | Imperial Rule Assistance Association | Shōwa statism | 1940 | 1945 | | Asia |
Philippine Executive Commission | Association for Service to the New Philippines | Filipino nationalism, National conservatism, Fascism, Japanophilia, collaborationism | 8 December 1942 | 14 October 1943 | | Asia |
Kampuchea | Communist Party of Kampuchea | Communism, Marxism–Leninism, Agrarianism, Autarky, Khmer nationalism, Ultranationalism | 17 April 1975 | 22 June 1982 | | Asia |
Kenya | Kenya African National Union | Kenyan nationalism, Conservatism | 1982 | 1991 | | Africa |
Independent State of Croatia | Ustaša – Croatian Revolutionary Movement | Croatian irredentism, Croatian ultranationalism, National conservatism, Social conservatism, Clerical fascism, Fascist corporatism, Political Catholicism, Anti-communism | 10 April 1941 | 8 May 1945 | | Europe |
Latvia | Communist Party of Latvia | Communism, Marxism–Leninism, democratic centralism, state socialism | 17 December 1918 | 13 January 1920 | | Europe |
Latvia | Communist Party of Latvia | Communism, Marxism–Leninism, democratic centralism, state socialism | 21 July 1940 | 5 August 1940 | | Europe |
Libya | Arab Socialist Union | Arab nationalism, Arab socialism, Pan-Arabism, Nasserism, Nationalism | 1971 | 1977 | | Africa |
Lithuania–Byelorussia | Communist Party of Lithuania and Belorussia | Communism, Marxism–Leninism, democratic centralism, state socialism | 17 February 1919 | 17 July 1919 | | Europe |
Lithuania | Lithuanian Nationalist Union | Lithuanian nationalism, National conservatism, Social conservatism, Fascist corporatism, Anti-communism | 1936 | 1940 | | Europe |
Lithuania | Communist Party of Lithuania | Communism, Marxism–Leninism, democratic centralism, state socialism | 21 July 1940 | 3 August 1940 | | Europe |
Democratic Republic of Madagascar | National Front for the Defense of the Revolution | Left-wing nationalism, Scientific socialism | 1976 | 1989 | | Africa |
Malawi | Malawi Congress Party | Ubuntu, Conservatism, African nationalism, Anti-colonialism | 1964 | 1993 | | Africa |
Mali | Sudanese Union – African Democratic Rally | African nationalism, Pan-Africanism, African socialism | 1960 | 1968 | | Africa |
Mali | Democratic Union of the Malian People | African socialism, Democratic centralism | 1976 | 1991 | | Africa |
Manchukuo | Concordia Association | Fascism, Monarchism, Manchurian nationalism, Pan-Asianism, Anti-communism, Personalism, collaborationism | 1 April 1932 | 1 May 1945 | | Asia |
Mauritania | Mauritanian People's Party | Nationalism, Centralism, Islamic socialism | 1961 | 1978 | | Africa |
Mexico | Institutional Revolutionary Party | Revolutionary nationalism, Big tent | 4 March 1929 | 2 July 2000 | 71 years, 120 days | North America |
Mongolia | Mongolian People's Revolutionary Party | Communism, Marxism–Leninism | 1921 | 29 July 1990 | | Asia |
Mozambique | FRELIMO | Marxism–Leninism | 25 June 1975 | 1 December 1990 | | Africa |
Niger | Nigerien Progressive Party – African Democratic Rally | African nationalism, Pan-Africanism | 1960 | 1974 | | Africa |
Niger | National Movement for the Development of Society | Conservatism | 1989 | 1991 | | Africa |
Vietnam (partially) | Workers' Party of North Vietnam (League for the Independence of Vietnam) | Communism, Marxism–Leninism, Ho Chi Minh Thought | 2 September 1945 | 1946[citation needed] | | Asia |
North Vietnam | Workers' Party of North Vietnam (Vietnamese Fatherland Front) | Communism, Marxism–Leninism, Ho Chi Minh Thought | 1955 | 2 July 1976 | | Asia |
North Yemen | General People's Congress | Yemeni nationalism, Arab nationalism, Pan-Arabism, Big tent | 1982 | 1988 | | Asia |
National Government | National Rally | Fascism, Nazism, Fascist corporatism, Anti-communism, Collaborationism | 25 September 1940 | 8 May 1945 | | Europe |
Ottoman Empire | Union and Progress Party | İttihadism | 11 June 1913 | 1918 | | Asia/Europe |
Paraguay | Colorado Party | Conservatism, national conservatism | 1947 | 1962 | | South America |
Persia | Communist Party of Persia | Communism, Marxism–Leninism | 1920 | 1921 | | Asia |
Republic of the Philippines | Association for Service to the New Philippines | Filipino nationalism, National conservatism, Fascism, Japanophilia, collaborationism | 14 October 1943 | 17 August 1945 | | Asia |
Poland | Polish United Workers' Party (Front of National Unity) | Marxism–Leninism, democratic centralism, state socialism | 5 February 1947 | July 1982 | | Europe |
Poland | Polish United Workers' Party (Patriotic Movement for National Rebirth) | Marxism–Leninism, democratic centralism, state socialism | July 1982 | 24 August 1989 | | Europe |
Portugal | National Union | Salazarism, corporatism, Integralismo Lusitano | 30 July 1930 | 8 October 1945 | | Europe |
Portugal | National Union | Salazarism, corporatism, Integralismo Lusitano | 31 January 1948 | September 1969 | | Europe |
Portugal | People's National Action (formerly National Union) | Corporatism, Integralismo Lusitano | 1970 | 25 April 1974 | | Europe |
Romania | Party of the Nation | Big tent, Romanian nationalism, Monarchism | 16 December 1938 | 6 September 1940 | | Europe |
National Legionary State | Iron Guard | Legionarism, clerical fascism, Christian nationalism | 6 September 1940 | 23 January 1941 | | Europe |
Romania | Romanian Communist Party (People's Democratic Front) | Communism, Marxism–Leninism | 5 February 1948 | 1968 | | Europe |
Romania | Romanian Communist Party (Front of Socialist Unity) | Communism, Marxism–Leninism, National Communism | 1968 | 1980 | | Europe |
Romania | Romanian Communist Party (Front of Socialist Unity and Democracy) | Communism, Marxism–Leninism, National Communism | 1980 | 29 December 1989 | | Europe |
Rwanda | Parmehutu | Hutu Power | 1965 | 1973 | | Africa |
Rwanda | National Revolutionary Movement for Development | Hutu Power, Ultranationalism, Social conservatism, Anti-communism | 1978 | 1991 | | Africa |
San Marino | Sammarinese Fascist Party | Italian fascism, Corporatism | 1926 | 1943 | | Europe |
San Marino | Republican Fascist Party of San Marino | Italian fascism | 1943 | 1944 | | Europe |
Senegal | Socialist Party of Senegal | African nationalism, African socialism | 1966 | 1974 | | Africa |
Seychelles | Seychelles People's Progressive Front | Communism, Marxism-Leninism | 1977 | 1991 | | Africa |
Sierra Leone | All People's Congress | African nationalism, Democratic socialism | 1978 | 1991 | | Africa |
Slovak Republic | Hlinka's Slovak People's Party – Party of Slovak National Unity | Clerical fascism, Slovak nationalism | 14 March 1939 | 8 May 1945 | | Europe |
Somalia | Somali Revolutionary Socialist Party | Islamic socialism, Marxism–Leninism, Pan-Somalism Scientific socialism, Somali nationalism | July 1976 | 26 January 1991 | | Africa |
South Yemen | National Liberation Front | Arab nationalism, Arab socialism | 30 November 1967 | 31 October 1978 | | Asia |
South Yemen | Yemeni Socialist Party | Communism, Marxism–Leninism | 31 October 1978 | 22 May 1990 | | Asia |
Yemen | Yemeni Socialist Party | Communism, Marxism–Leninism | 21 May 1994 | 7 July 1994 | | Asia |
Estonia | Russian Communist Party (Central Committee of the Estonian Sections) | Communism, Marxism–Leninism, democratic centralism, state socialism | 29 November 1918 | 5 June 1919 | 188 days | Europe |
Russian Soviet Federative Socialist Republic | Russian Communist Party | Communism, Marxism–Leninism, democratic centralism, state socialism | 8 March 1918 | 30 December 1922 | 4 years, 297 days | Europe/Asia |
Russian Soviet Federative Socialist Republic | Russian Social Democratic Labour Party | Communism, Marxism–Leninism, democratic centralism, state socialism | 19 January 1918 | 8 March 1918 | 48 days | Europe/Asia |
Union of Soviet Socialist Republics | Russian Communist Party | Communism, Marxism–Leninism, democratic centralism, state socialism | 30 December 1922 | 31 December 1925 | 3 years, 1 day | Europe/Asia |
Union of Soviet Socialist Republics | All-Union Communist Party | Communism, Marxism–Leninism, democratic centralism, state socialism, Stalinism | 31 December 1925 | 13 October 1952 | 26 years, 287 days | Europe/Asia |
Union of Soviet Socialist Republics | Communist Party of the Soviet Union | Communism, Marxism–Leninism, democratic centralism, state socialism | 13 October 1952 | 9 October 1990 | 37 years, 361 days | Europe/Asia |
Kingdom of Spain | Patriotic Union | Spanish nationalism, Political Catholicism, Monarchism, Conservatism | 1924 | 1930 | | Europe |
Spanish State | FET y de las JONS | Francoism, Falangism, Spanish nationalism, traditionalism, National Catholicism, anti-liberalism, corporatism | 1 April 1939 | 6 July 1976 | | Europe |
Democratic Republic of the Sudan | Sudanese Socialist Union | Arab nationalism, Arab socialism, Anti-communism | 1971 | 1985 | | Africa |
Sudan | National Congress Party | Islamism, Arab nationalism, Salafism, Social conservatism | 1989 | 2005 | | Africa |
Syrian Republic | Arab Liberation Movement | Pan-Arabism, Modernization, Pro-Western | 1953 | 1954 | | Asia |
Syria | Arab Socialist Ba'ath Party (National Progressive Front) | Neo-Ba'athism | 1963 | 27 February 2012 | | Asia |
São Tomé and Príncipe | Movement for the Liberation of São Tomé and Príncipe – Social Democratic Party | Communism, Marxism–Leninism | 1975 | 1990 | | Africa |
Tanganyika | Tanganyika African National Union | African nationalism, African socialism, Ujamaa | 1961 | 1977 | | Africa |
Tanzania | Chama Cha Mapinduzi | Ujamaa, African socialism | 1977 | 1992 | | Africa |
Togo | Party of Togolese Unity | African nationalism | 1962 | 1963 | | Africa |
Togo | Rally of the Togolese People | African nationalism, Right-wing populism | 1969 | 1991 | | Africa |
Tunisia | Neo Destour | Tunisian nationalism, Bourguibism | 1963 | 1964 | | Africa |
Tunisia | Socialist Destourian Party | Tunisian nationalism, Secularism, Bourguibism | 1964 | 1981 | | Africa |
Turkey (one-party period) | Republican People's Party | Kemalism | 1923 | 1945 | | Asia/Europe |
Turkmenistan | Democratic Party of Turkmenistan | Turkmen nationalism, Secularism, Social conservatism, Catch-all party | 1992 | 2008 | | Asia |
Tuva | Tuvan People's Revolutionary Party | Communism, Marxism–Leninism, democratic centralism, state socialism | 14 August 1921 | 11 October 1944 | | Asia |
Uganda | Uganda People's Congress | Social democracy, African nationalism, Pan-Africanism | 1969 | 1971 | | Africa |
Ukraine | Communist Party of Ukraine | Communism, Marxism–Leninism, democratic centralism, state socialism | 10 March 1919 | 30 December 1922 | | Europe |
United Arab Republic | National Union | Arab nationalism, Arab socialism, Pan-Arabism | 1958 | 1961 | | Africa |
Upper Volta | Voltaic Democratic Union-African Democratic Rally | African nationalism, Pan-Africanism | 1960 | 1966 | | Africa |
Yugoslavia | Yugoslav Radical Peasants' Democracy | Royalism, Yugoslav nationalism, Agrarianism, Centralism, Anti-liberalism | 1929 | 1931 | | Europe |
Yugoslavia | League of Communists of Yugoslavia (Socialist Alliance of Working People of Yugoslavia) | Marxism–Leninism, Titoism, Yugoslavism | 29 November 1945 | 22 January 1990 | | Europe |
Zaire | Popular Movement of the Revolution | Mobutism, Zairean nationalism, Authenticité | 1970 | 1990 | | Africa |
Zambia | United National Independence Party | African socialism, African nationalism | 1972 | 1990 | | Africa |
Zanzibar | Afro-Shirazi Party | African nationalism, Marxism–Leninism | 1964 | 1977 | | Africa |