Italian Socialist Party ended in 1994.
Italian Socialist Party was created in 1892.
Italian Revolutionary Socialist Party was created in 1881.
New Italian Socialist Party was created on 2001-01-20.
Italian Socialist Party of Proletarian Unity was created on 1964-01-12.
Socialist Party of Vietnam ended in 1988.
Portuguese Socialist Party ended in 1933.
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.