The Workers Revolutionary Party (, PRT) was a far-left political party in Portugal. It was created on 31 January 1975 and formally registered with the Supreme Court of Justice on 25 March 1975. It followed the Argentine revolutionary Nahuel Moreno's form of Trotskyism, and was in sympathy with, but not formally affiliated to, the reunified Fourth International. The party's stated objective was to organise and lead the working class towards the seizure of power and a socialist revolution, with the ultimate aim of abolishing capitalism and progressively eliminating social classes. The party published the newspaper Combate Socialista (Socialist Combat).
According to the party's constitution of 25 March 1975, the PRT was structured as follows, from highest to lowest authority:
In May 1976, the PRT and the Internationalist Communist League (LCI) jointly presented Arlete Vieira da Silva as their candidate for the presidential election of 1976. She would have been the first woman to stand for the Portuguese presidency. At the press conference announcing the candidacy, the PRT was represented by its leader (dirigente) António Sá Leal, while the LCI was represented by João Cabral Fernandes and José Ferreira Fernandes. Speaking to the Diário de NotÃÂcias on 10 May 1976, Sá Leal declared that the bourgeoisie had already chosen its presidential candidate, singling out the PPD as having given the signal. The candidacy attracted significant press coverage but ultimately collapsed before the election took place.
During its brief existence, the PRT contested two elections with modest results. In the 1976 legislative election it stood in four constituencies: Coimbra, Lisbon, Porto and Setúbal, receiving a total of 5,171 votes (0.09%). In the same year it contested the Lisbon municipal election, obtaining 278 votes (0.01%).
In 1979 the PRT merged with the Internationalist Communist League (LCI) to form the Revolutionary Socialist Party (PSR); the merger was approved by order of the Supreme Court of Justice dated 2 April 1979. The PSR eventually became part of the Left Bloc.