The youth organization of PCP is the Portuguese Communist Youth (), and was founded on 10 November 1979, after the unification of the Communist Students League and the Young Communist League. The Portuguese Communist Youth is a member of the World Federation of Democratic Youth, a youth non-governmental organization that congregates several left-wing youth organizations from all the continents. The WFDY holds an international event, named World Festival of Youth and Students, in which the Portuguese Communist Youth uses to participate.