| Abbreviation | Definition |
|---|---|
| USBA | United States Boomerang Association |
| USBA | United States Boxing Association |
| USBC | United States Bowling Congress |
| USBF | United States Bridge Federation |
| USCA | United States Canoe Association |
| USCA | United States Croquet Association |
| USCC | United States Cross Country |
| USCF | United States Chess Federation |
| USCF | United States Cricket Federation |
| USCF | United States Cycling Federation |
| USCGN | United States Championship Golf Network |
| USCGN | United States Competitive Gaming Network |
| USCGT | United States Challenge Golf Tour |
| USCS | United Sprint Car Series |
| USCW | United States Championship Wrestling |
| USDBF | United States Dragon Boat Federation |
| USDF | Utah Self Defense & Fitness |
| USDRA | United Scale Drag Racer Association |
| USDSA | United States Deaf Skiers Association |
| USEA | United States Eventing Association |