| Abbreviation | Definition |
|---|---|
| USMARFORPAC | United States MARine FORces Component, PACific Command |
| USMARFORSOUTH | United States Marine Component, Southern Command |
| USMARFORSOUTH | United States MARine FORces Component, SOUTHern Command |
| USMB | United States Marine Band |
| USMB | United States Marine Barracks, Washington, D. C. |
| USMB | United States Metric Board |
| USMC | U Signed the Mother-F*#@ing Contract |
| USMC | Uncle Sam’s Motorcycle Club |
| USMC | Uncle Sam's Misguided Children |
| USMC | Uncle Sams Motorcycle Club |
| USMC | United States Marine Corp |
| USMC | United States Marine Corps |
| USMCABV | United States Marine Corps Assault Breacher Vehicle |
| USMCEB | United States Military Communications-Electronics Board |
| USMCGCM | United States Marine Corps Good Conduct Medal |
| USMCR | United States Marine Corps Reserve |
| USMD | United States Military District |
| USMEPCOM | U.S. Military Entrance Processing Command |
| USMER | United States Merchant Ship Vessel Locator Reporting System |
| USMF | United States Marine Forces |