| Acronym | Definition |
|---|
| USCL➣University of South Carolina Lancaster |
| USCL➣US Chess Live |
| USCL➣United States Chess League |
| USCL➣United Society for Christian Literature |
| USCL➣United States Coalition for Life (est. 1972) |
| USCL➣Union Sportive des Cheminots Lyonnais (French: Sports Union of Lyonnais Railwaymen; Lyon, France) |
| USCL➣United States Certified Letters (mail) |