UCL may refer to refer to:
In education:
- University College London, a public research university in London, United Kingdom and a constituent college of the University of London
- Université catholique de Louvain, university based in Louvain-la-Neuve and Brussels, Belgium
- UCL-St.-Luc, academic hospital associated with the university, based in Brussels
- Catholic University of Lyon (French: Université catholique de Lyon)
- University College Lahore, a university in Pakistan
In sport:
- UEFA Champions League, an annual European club football competition
- United Counties Football League, an English football league known as "United Counties League"
In science:
- Ulnar collateral ligament (elbow) reconstruction
- Ulnar collateral ligament (thumb)
- Upper Control Limit, one of the control limits on a statistical process control chart
In other uses:
- Unified Class Library, an alternative name for Base Class Library from Microsoft .Net
- Uganda Clays Limited, a company in Uganda that manufactures building materials from clay