USL
USL is an abbreviation for
- United Soccer Leagues, the umbrella organization of some American soccer leagues
- Unix System Laboratories, Unix development division of AT & T and later Novell
- University of Southwestern Louisiana
- United Supporters Lucerne, an independent umbrella organization of active fans of the Football Club Luzern
- United States Lines, an American shipping company
- Upper specification limit ( lower specification limit LSL opposite of, both operands in the statistical quality assurance)
- Uniunea Social Liberală, National Liberal Union, center-left party merger in Romania
- Disambiguation
- Abbreviation