Luxembourg Socialist Workers' Party

Luxembourg Socialist Workers' Party
Lëtzebuerger Sozialistesch Aarbechterpartei
AbbreviationLSAP
POSL
PresidentFrancine Closener & Dan Biancalana
General SecretarySacha Pulli
Founded1902
Headquarters68, rue de Gasperich
Luxembourg City
Youth wingLuxembourg Socialist Youths
IdeologySocial democracy
Political positionCentre-left
Regional affiliationSGD/SVD
European affiliationParty of European Socialists
European Parliament groupProgressive Alliance of Socialists and Democrats
International affiliationProgressive Alliance
Socialist International
Colours  Red
Chamber of Deputies
12 / 60
European Parliament
1 / 6
Local councils
154 / 722
Benelux Parliament
2 / 7
Website
lsap.lu

The Luxembourg Socialist Workers' Party (Luxembourgish: Lëtzebuerger Sozialistesch Aarbechterpartei, French: Parti ouvrier socialiste luxembourgeois, German: Luxemburger Sozialistische Arbeiterpartei), abbreviated to LSAP or POSL, is a social democratic, pro-European political party in Luxembourg. The LSAP sits on the centre-left of the political spectrum.

The LSAP is the third-largest party in the Chamber of Deputies, having won 11 of 60 seats at the 2023 general election, and has one seat in the European Parliament. Since March 2022, the party's President have been Francine Closener and Dan Biancalana.

The party is close to the Confederation of Independent Trade Unions, the country's largest trade union centre, but they have no formal links. The LSAP is particularly strong in the south of the country, controlling most of the mayoralties in the large towns of the Red Lands. It is affiliated with the Socialist International, the Progressive Alliance, and the Party of European Socialists.