| Country | Party | Ideology | Date of establishment | Date of dissolution | Duration | Continent | 
|---|
|  Republic of Afghanistan | National Revolutionary Party | Pashtun nationalism Pashtunization
 Republicanism
 Secularism
 | 14 February 1977[37][38] | 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
 Albanian nationalism
 State atheism
 | 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[39] |  | 1943 | 1944 | 1 year, 0 days | Asia | 
|  State of Burma | Maha Bama Asi Ayon[40] |  | 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[41] | 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][42] | Nationalism[43] | 18 January 1939[44] | 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[45] | 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[note 2]/Taiwan |  Kuomintang | Tridemism | 1 July 1925 | 1 May 1991 | 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[46][47] | 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 | 
|  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 | 
| National Union | Nasserism Pan-Arabism
 Socialism
 | 1957 | 1962 | 5 years, 0 days | Africa | 
| Arab Socialist Union | Arab nationalism Arab socialism
 Pan-Arabism
 Nasserism
 | 1961 | 1976 | 15 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 | 
|  Guatemala |  National Liberation Movement | Neo-fascism Ultraconservatism
 Anti-communism
 | 1954 | 1958 |  | 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 | Magyarism 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
 | 4 November 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 | 
|   Iraq | Iraqi Arab Socialist Union | Arab nationalism Arab socialism
 Pan-Arabism
 Nasserism
 | 14 July 1964 | 17 July 1968 | 4 years, 3 days | Asia | 
|   Iraq |  Arab Socialist Ba'ath Party | Saddamist Ba'athism Arab nationalism
 Arab socialism
 Pan-Arabism
 Militarism
 | 17 July 1968 | 9 April 2003 | 34 years, 266 days | Asia | 
|  Fascist Italy |  National Fascist Party | Fascism Corporatism
 Ultranationalism
 Totalitarianism
 | 17 May 1928[48] | 27 July 1943 |  | Europe/Africa | 
|  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 Militarism
 | 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 | 310 days | Asia | 
|  Kampuchea |  Communist Party of Kampuchea | Communism Marxism–Leninism
 Agrarianism
 Autarky
 Khmer nationalism
 Ultranationalism
 | 17 April 1975 | 7 January 1979 | 2 years, 265 days | 
|  Kenya | Kenya African National Union | Kenyan nationalism Conservatism
 | 1969 (de facto) 1982 (de jure)
 | 1991 |  | Africa | 
|  First Republic of Korea | Liberal Party | Ilminism Conservatism
 Korean nationalism
 | 17 December 1951 | 19 April 1960 |  | Asia | 
|  Third Republic of Korea | Democratic Republican Party | Korean nationalism Conservatism
 Corporatism
 | 2 February 1963 | 12 December 1979 |  | Asia | 
|  Fifth Republic of Korea |  Democratic Justice Party | Conservatism Authoritarianism
 | 15 January 1981 | 16 December 1987 |  | Asia | 
|  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 | 4 years, 28 days | Europe | 
|  Latvia | Communist Party of Latvia | Communism Marxism–Leninism
 democratic centralism
 state socialism
 | 17 December 1918 | 13 January 1920 | 1 year, 27 days | Europe | 
|  Latvia | Communist Party of Latvia | Communism Marxism–Leninism
 Democratic centralism
 State socialism
 | 21 July 1940 | 5 August 1940 |  | Europe | 
|  Liberia | True Whig Party | Black conservatism Centralization
 Protectionism
 Whiggism (until 1940s)
 | 1878 | April 1980 |  | Africa | 
|  Libya | Arab Socialist Union | Arab nationalism Arab socialism
 Pan-Arabism
 Nasserism
 | 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
 | 1926[49] | 1940 | 14 years | 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[50] | 1 May 1945[50] |  | 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 | 15 years, 159 days | 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 | 4 years, 225 days | Europe | 
|  Ottoman Empire | Union and Progress Party[51] | 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 | 20 July 1982 |  | Europe | 
|   Poland |  Polish United Workers' Party (Patriotic Movement for National Rebirth) | Marxism–Leninism Democratic centralism
 State socialism
 | 20 July 1982 | 7 April 1989 |  | Europe | 
|  Portugal |  National Union | Salazarism corporatism
 Integralismo Lusitano
 | 30 July 1930[52] | 8 October 1945[52] |  | Europe | 
|  Portugal |  National Union | Salazarism corporatism
 Integralismo Lusitano
 | 31 January 1948[53] | September 1969[note 3] |  | Europe | 
|  Portugal |  People's National Action (formerly National Union) | Corporatism Integralismo Lusitano
 | 1970 | 25 April 1974 |  | Europe | 
|  Romania |  National Renaissance Front | 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
 | 1979 | 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 | 
|  People's Republic of Southern Yemen |  National Liberation Front,  Yemeni Socialist Party
 | Arab nationalism Arab socialism
 | 30 November 1967 | 31 October 1978 |  | Asia | 
|  People's Democratic Republic of Yemen |  Yemeni Socialist Party | Communism Marxism–Leninism
 | 31 October 1978 | 22 May 1990 |  | Asia | 
|  Democratic Republic of 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[54] | 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[54] | 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[54] | 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[54] | 13 October 1952[54] | 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[54] | 9 October 1990[55] | 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[56] |  | 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 | Syrian nationalism Modernization
 Pro-Western
 | 1953 | 1954 |  | Asia | 
|  Syrian Arab Republic |  Arab Socialist Ba'ath Party (National Progressive Front) | Neo-Ba'athism Pan-Arabism
 Arab nationalism
 Arab socialism
 Militarism
 | 8 March 1963 | 27 February 2012[57][58] 8 December 2024 (de-facto) [note 4][59]
 |  | 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
 Arab nationalism
 Secularism
 | 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 | 
|