Somali Revolutionary Socialist Party ended in 1991.
Ukrainian Socialist-Revolutionary Party ended in 1917.
Revolutionary Socialist Labor Party ended in 1883.
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.