Polish Social Democratic Party of Galicia ended in 1919.
Polish Social Democratic Party of Galicia was created in 1890.
Polish Christian Democratic Party ended in 1928.
Polish Christian Democratic Party was created in 1919.
Polish-Lithuanian Social Revolutionary Party was created in 1881.
The Polish Communist Party used to be called the Polish United Workers' Party. In 1989, the party was dissolved and many of its members joined socialist parties such as Social Democracy of the Republic of Poland which in turn became a constituent of the Democratic Left Alliance.
Nationwide Social Democratic Party was created in 2006.
Social Democratic Party of India was created in 2009.
Social Democratic Party of Slovakia was created in 1990.
Social-Democratic Party of Wisconsin was created in 1897.
Social-Democratic Party of Wisconsin ended in 1972.
Social Democratic Party 'Harmony' was created in 2010.
Social Democratic Party - Romania - was created in 1992.