| Abbreviation | Definition |
|---|---|
| USMRA | United States Mine Rescue Association |
| USNI | United States Naval Institute |
| USNMF | United States Navy Memorial Foundation |
| USO | United Service Organizations |
| USO | United Services Organization |
| USO | United States Overseas |
| USPA | United States Psychotronics Association |
| USPF | United States Piping Foundation |
| USPF | University of Southern Philippines Foundation |
| USPIRG | United States Public Interest Research Group |
| USPS | United States Power Squadrons |
| USPSTF | U.S. Preventive Services Task Force |
| USPSTF | United States Preventive Services Task Force |
| USRT | United States Radiologic Technologists |
| USSA | United States Sportsmen's Alliance |
| USSAE | United States Sportsmen's Alliance Endowment |
| USSC | United States Sign Council |
| UTF | University Trust Fund |
| UTFF | Utah Track and Field Foundation |
| UTFI | University of Texas Film Institute |