In the German-speaking community, the party is known as the Sozialistische Partei (SP).

The PS is very commonly part of governing coalitions, and dominates most local authorities because of the extremely fragmented nature of Belgian political institutions, particularly in Francophone areas.

The Carolorégienne affair caused Jean-Claude Van Cauwenberghe to step down as Minister-President of the Walloon region.

Results for the Chamber of Representatives, in percentages for the Kingdom of Belgium.

[11] Its ideology and image are a mix of social democracy and modern electoral marketing.