WSL may refer to:
- White Star Line, a shipping company, owner of the Titanic
- Wide-spectrum language, a kind of programming language
- Weatherscan, 24-hour weather channel formerly known as Weatherscan Local
- Workers' Socialist League, a UK. Trotskyist party
- World Series Light, race competition
- FA Women's Super League, English semi-professional league for women's association football clubs
- Women's Super League, top level women's rugby union league in England
- Swiss Federal Institute for Forest, Snow and Landscape Research (Eidgenössische Forschungsanstalt für Wald, Schnee und Landschaft, WSL)