The Socialist Party (Portuguese: Partido Socialista, PS) is a centre‑left, social‑democratic political party in Portugal. Founded on 19 April 1973 in Bad Münstereifel, West Germany, by exiled militants of the Portuguese Socialist Action (Acção Socialista Portuguesa, ASP), the PS was legalized on 1 February 1975 following the Carnation Revolution of 1974 that ended the Estado Novo dictatorship.
Ideology and Position
The PS adheres to social democracy and positions itself on the centre‑left of the political spectrum. It is a member of the Socialist International, the Progressive Alliance, and the Party of European Socialists, and its members sit in the Progressive Alliance of Socialists and Democrats group in the European Parliament.
Organisational Structure
- President: Carlos César (ceremonial role)
- Secretary‑General: José Luís Carneiro (elected June 2025)
- Headquarters: Largo do Rato 2, Lisbon
- Youth wing: Socialist Youth (Juventude Socialista)
- Women’s wing: National Department of the Socialist Women (Departamento Nacional das Mulheres Socialistas)
The party publishes the newspaper Acção Socialista and maintains a student wing, the Estudantes Socialistas.
Historical Overview
1970s – After the 1974 revolution, the PS won the 1975 Constituent Assembly election and the 1976 legislative election, forming Portugal’s first constitutional government under founder Mário Soares. The government was unstable and fell in 1978.
1980s – The party lost the 1979 election, returned to power in 1983 in a coalition (“Central Bloc”) with the centre‑right Social Democratic Party (PSD), but was defeated again in 1985.
1990s–2000s – Under António Guterres, the PS won the 1995 election, governing until 2002. José Sócrates led the party to an absolute parliamentary majority in 2005.
2010s – The PS lost the 2011 snap election amid the sovereign‑debt crisis but returned to government in 2015 after forming a confidence‑and‑supply agreement with the Left Bloc (BE) and the Unitary Democratic Coalition (CDU). António Costa became Prime Minister and was re‑elected in 2019 and 2022, the latter with an absolute majority.
2020s – Costa resigned in November 2023; a leadership election in December 2023 chose José Luís Carneiro as party leader. The PS narrowly lost the 2024 legislative election, moving into opposition, and suffered a further defeat in the 2025 election, falling to third place in the Assembly of the Republic for the first time since the 1974 revolution.
Electoral Representation (as of 2025)
- Assembly of the Republic: 58 of 230 seats (opposition)
- European Parliament: 8 of 21 Portuguese seats (Progressive Alliance of Socialists and Democrats)
- Regional Parliaments: 31 of 104 seats
- Local Government: 1 190 mayors, 3 216 councilors, and 127 190 parish presidents
Affiliations
- European: Party of European Socialists; Progressive Alliance of Socialists and Democrats (European Parliament)
- International: Socialist International; Progressive Alliance
The PS’s official colours are red (official) and pink (customary), and its anthem is “The Internationale.” It remains one of Portugal’s three major parties, alongside the centre‑right Social Democratic Party (PSD) and the far‑right populist party Chega (CH).