| USPA | U S Piledriver Affiliates 
| Others |
| USPA | U S Polo Assn
| Others |
| USPA | U Shoulda Paid Attention
| Others |
| USPA | U Slot Patch Antenna
| Others |
| USPA | UCSC STEM Postdocs Association
| Others |
| USPA | Ukrainian Sea Ports Authority
| Others |
| USPA | Ultrasonic Parking Assistance
| Others |
| USPA | Undergraduate Scholarship Programs Application
| Others |
| USPA | United School of Performing Art
| Others |
| USPA | United Services Planning Association
| Others |
| USPA | United States Padel Association
| Others |
| USPA | United States Parachute Association
| Others |
| USPA | United States Permafrost Association
| Others |
| USPA | United States Pilates Association
| Others |
| USPA | United States Pilots Association
| Others |
| USPA | United States Polka Association
| Others |
| USPA | United States Polo Association
| Others |
| USPA | United States Poolplayers Association
| Others |
| USPA | United States Powerlifting Association
| Others |
| USPA | United States Property & Appraisal
| Others |
| USPA | United States Psychotronics Association
| Others |
| USPA | United States Pullers Association
| Others |
| USPA | United Steelworkers Press Association
| Others |
| USPA | Universal Stress Protein A
| Others |
| USPA | Universal Studios Port Aventura
| Others |
| USPA | University Students of Performing Arts
| Others |
| USPA | University Support Personnel Association
| Others |
| USPA | University Surplus Property Association
| Others |
| USPA | Ur Stealing People Appetite
| Others |
| USPA | You Share Playing After
| Others |