Partido Socialista is Spanish and Portuguese for "Socialist Party". Used as a proper noun without any other adjectives, it may refer to:
Socialist Party (Argentina) Socialist Party (Bolivia, 1971) Socialist Party of Chile Socialist Party (Guatemala) Socialist Party (Panama) Socialist Party (Peru) Socialist Party (Portugal) Socialist Party of Uruguay Partido Socialista de Puerto Rico Partido Socialista Puertorriqueño
See also List of socialist parties