Solidarity (French: solidaritéS)[3] is a socialist and Trotskyist political party, present in the French-speaking part of Switzerland, in the cantons of Geneva, Vaud, Neuchâtel and Fribourg.

It was the furthest left party represented in the National Council until losing their only seat in 2023.

In the 1995 federal elections, it received 0.3% of the vote, failing to win a seat.

Its vote share increased to 0.5% in the 1999 elections, and a party member running on a list named "Alliance of the Left (Solidarity–Independents)" won a seat in the National Council.

[citation needed] This article about a Swiss political party is a stub.