Socialist Youth may refer to:

International Union of Socialist Youth

Scottish Socialist Youth

Socialist German Workers Youth

Socialist Workers Youth of Saarland

Socialist Youth (Brazil), an organization of the Brazilian Communist Party

Socialist Youth (Chile)

Socialist Youth (Croatia)

Socialist Youth (Faroe Islands)

Socialist Youth (Ireland)

Socialist Youth (Norway)

Socialist Youth (Portugal)

Socialist Youth Austria

Socialist Youth League (Denmark, 1935)

Socialist Youth League (Sweden)

Socialist Youth League (United States)

Socialist Youth League of Germany

Socialist Youth of Spain

Socialist Youth Union (Bulgaria)

Unified Socialist Youth

Workers' Youth League (Norway)

Young European Socialists, an association of organizations in the European Union

Socialist Youth, the newspaper of the British Labour Party Young Socialists