Country | Party | Political orientation | Reason defunct |
Australia | Workers Party | Libertarian | |
Bahamas | Workers' Party | | |
Barbados | Workers Party of Barbados | Marxist | Defunct due to unpopularity |
Brazil | Worker's and Peasant's Bloc | | 1937–1930. |
Brazil | Work's National Union | | 1945–1948. |
Brazil | Nationalist Workers' Party | | 1989. |
Brazil | Nationalist Brazilian Workers' Party | | 1989–1992. Merged into Labour Party of Brazil. |
Brazil | General Workers' Party | | 1995–2003. Merged into Liberal Party. |
Cambodia | Workers' Party of Kampuchea (1960–1966) | Communist | Renamed to Communist Party of Kampuchea in 1966. Dissolved in 1981. |
Canada | Workers' Party of Canada (1922-1924) | Communist | Legal face of the illegal Communist Party until the government's ban was lifted. |
Canada | Workers' Party of Canada (1934-1937) | Trotskyist | Dissolved upon entry into the Co-operative Commonwealth Federation. Reformed in 1939 as the Socialist Workers League. |
Canada | Revolutionary Workers Party (1946-1952) | Trotskyist | Entered the Co-operative Commonwealth Federation. |
Croatia | Croatian Workers Party (1906-1918) | Left-wing populist | |
Czech Republic | Workers' Party | National Socialist | Banned in 2010 by the Supreme Administrative Court of the Czech Republic |
Estonia | Estonian Workers' Party | Communist | |
Ethiopia | Workers' Party of Ethiopia | Marxist–Leninist | Overthrown in 1991 |
Finland | Socialist Workers' Party of Finland | Marxist | Banned in 1923 |
France | Workers' Party (France, 1991–2008) | Trotskyist | |
Germany | German Workers' Party | Nationalist | Renamed the National Socialist German Workers' Party in 1920 |
Germany | National Socialist German Workers' Party | National Socialist | Dissolved and banned in 1945 |
Germany | Workers' Party of Germany | Juche | |
Hungary | Hungarian Workers' Party | National Socialist | Dissolved and regrouped |
Ireland | Irish Workers' Party | Communist | Merged with the Communist Party of Northern Ireland to reconstitute the all-Ireland Communist Party of Ireland in 1962 |
Israel | Workers Party of Eretz Israel (Mapai) | Labor Zionism | Merged into the Israeli Labor Party |
Israel | United Workers Party (Mapam) | Labor Zionism | Merged into Meretz |
Israel | Workers of Agudat Yisrael | Haredi Judaism | |
Korea | Workers' Party of North Korea Workers' Party of South Korea | Communist Communist | Merged to form the Workers' Party of Korea in 1949 |
Latvia | Workers' Party | Left-wing politics | |
Mexico | Mexican Workers' Party | Social democratic | Merged with the Unified Socialist Party of Mexico to form the Mexican Socialist Party in 1987 |
New Zealand | Workers Party of New Zealand | Marxist | Renamed to Fightback in 2013 |
North Macedonia | Workers Party | Left-wing politics | |
Poland | Polish Workers' Party | Communist | Merged to form the Polish United Workers' Party in 1948 |
Poland | Polish United Workers' Party | Marxist–Leninist | Self-dissolved in 1990 |
Poland | Zionist Workers Party | |
Romania | Romanian Workers' Party | Communist | Renamed the Romanian Communist Party in 1965 |
South Africa | Workers Party of South Africa | Trotskyist | Banned in 1953 |
Spain | Workers' Party of Marxist Unification | Marxist | Dissolved in 1980 |
Trinidad and Tobago | Workers and Farmers Party | Marxist | Defunct due to unpopularity |
Trinidad and Tobago | British Empire Citizens' and Workers' Home Rule Party | Garveyism | Popularly known as the Butler Party, defunct due to unpopularity |
Trinidad and Tobago | Progressive Workers Democrat Movement | | Defunct due to unpopularity |
Turkey | Workers' Party | Scientific socialist | Renamed the Patriotic Party in 2015 |
United Kingdom | International Leninist Workers Party | Marxist–Leninist | Dissolved into the Socialist Labour Party in 1996 |
United Kingdom | Workers Party of Scotland | Marxist–Leninist | |
United States | Democratic Workers Party | Marxist–Leninist | Dissolved in 1986 |
United States | Workers Party | Trotskyist | Renamed the Independent Socialist League in 1949 |
United States | American Workers Party | Musteite | Merged into Workers Party of the United States |
United States | Workers Party of America | Marxist–Leninist | Became Communist Party USA in 1929. |
United States | Workers Party of the United States | Trotskyist | Absorbed into the Socialist Party of America in 1936 |