The Socialist Party of Uruguay (Spanish: Partido Socialista del Uruguay) is an Uruguayan political party founded in 1910. Its main leader and spokesman was Dr Emilio Frugoni, the most prominent advocate of socialist ideas in Uruguay.
The party was a member of the Labour and Socialist International between 1932 and 1940.
It is a member organisation of the ruling Broad Front Progressive Encounter-New Majority, the left-wing coalition that took office on March 1, 2005. Since 2001 to the present (2005) it has been led by Reinaldo Gargano, former Minister of Foreign Relations.