Portuguese Socialist Party was created in 1875.
Freedom Socialist Party was created in 1966.
Socialist Republican Party - Sudan - was created in 1951.
Unified Socialist Party of Mexico was created in 1981.
Social Democratic Action was created in 1951.
National Socialist People's Party of Sweden was created in 1926.
Portuguese Socialist Party ended in 1933.
Freedom Socialist Party was created in 1966.
Burma Socialist Party was created in 1945.
Nicaraguan Socialist Party was created in 1944.
Belgian Socialist Party was created in 1945.
Yemeni Socialist Party was created in 1978.
Republican-Socialist Party was created in 1911.
Socialist Mexican Party was created in 1987.
Gabonese Socialist Party was created in 1992.
Silesian Socialist Party was created in 1928.
Cuban Socialist Party was created in 1899.
Progressive Socialist Party was created in 1949.