| Abbreviation | Definition |
|---|---|
| USASI | United States of America Standards Institute |
| USBR | United States Bureau of Reclamation |
| USC | United State Citizen |
| USC | United States Census |
| USC | United States Customary |
| USC | United States Supreme Court |
| USC | US Congress |
| USCB | United States Census Bureau |
| USCBP | Customs and Border Protection |
| USCBP | United States Customs and Border Protection |
| USCC | U.S. China Econmic and Security Review Commission |
| USCERT | United States Computer Emergency Readiness Team |
| USCG | United States Capitol Guide |
| USCGS | United States Capitol Guide Service |
| USCGS | United States Coast and Geodetic Survey |
| USCIS | U.S. Citizenship and Immigration Services |
| uscis | United States Citizenship and Immigration Service |
| USCIS | United States Citizenship And Immigration Services |
| USCIT | United States Court of International Trade |
| USCO | United States Copyright Office |