| Abbreviation | Definition |
|---|---|
| USGR | United States Golf Register |
| USGT | United States Golf Teachers |
| USGT | United States Golf Teaching School |
| USGT | United States Grand Tournament |
| USGTF | United States Golf Teachers Federation |
| USGTS | United States Golf Teaching School |
| USHL | United States Hockey League |
| USIR | United States Inter-Regional Championships |
| USJF | United States Judo Federation |
| USK | United States Karate |
| USK | University of Sea Kayaking |
| USL | United Soccer Leagues |
| USLL | United States Little League |
| USLR | United States Lipizzan Registry |
| USMNT | United States Men's National Soccer Team |
| USMNT | United States Men's National Team |
| USMS | United States Master Swimming |
| USN | United Sports Nutrition |
| USND | United Sportsmen of North Dakota |
| USNF | United States Naginata Federation |