British Socialist Party ended in 1920.
National Socialist Party - UK - ended in 1941.
Socialist Workers' Party of Finland ended in 1923.
Combat Organization of the Polish Socialist Party ended in 1911.
National Socialist Workers' Party of Denmark ended in 1945.
German National Socialist Workers' Party - Czechoslovakia - ended in 1933.
British Socialist Party was created in 1911.
Socialist Party of Canada - British Columbia - was created in 1901.
Socialist Party of Vietnam ended in 1988.
Socialist Party of Slovenia ended in 1994.
Portuguese Socialist Party ended in 1933.
Italian Socialist Party ended in 1994.
Socialist Party of Washington ended in 1972.
Sammarinese Socialist Party ended in 2005.
Socialist Union Party ended in 1941.
Pacifist Socialist Party ended in 1991.
Republican-Socialist Party ended in 1934.
Socialist Party of America ended in 1973.