USSF
| Acronym | Definition |
|---|---|
| USSF | United States Special Forces (US Army) |
| USSF | United States Soccer Federation |
| USSF | United States Space Force (proposed branch) |
| USSF | United States Surfing Federation (Hermosa Beach, CA) |
| USSF | United States Space Foundation |
| USSF | Ukrainian Step by Step Foundation (Ukraine) |
| USSF | United States Sumo Federation (sumo wrestling) |
| USSF | United States Special Forces (gaming clan) |
| USSF | United Sim Special Forces (gaming clan) |