Socialist Party - Marxist - ended in 1958.
Revolutionary Socialist Party of India - Marxist - was created in 2005.
Marxist Party ended in 2004.
The Socialist Revolutionary Party, a non-Marxist party was formed in 1901. It had two factions, one for political agitation and one for terroristic violence. This party had nothing to do with the Bolshevik Party, which emerged from a split in the Russian Social Democratic Labor Party, which was a Marxist party.
The Socialist Republic of Vietnam is a Marxist-Leninist or single-party state.
Socialist Workers Party - UK - was created in 1977.
Socialist Party of Vietnam ended in 1988.
Portuguese Socialist Party ended in 1933.
Socialist Party of Slovenia ended in 1994.
Italian Socialist Party ended in 1994.
Socialist Party of Washington ended in 1972.
Republican Socialist Party ended in 1889.
Sammarinese Socialist Party ended in 2005.