| UMR | UK Music Rave 
| Others |
| UMR | Ultimate Metal Reviews
| Others |
| UMR | Unaccompanied Minor Refugee
| Others |
| UMR | Unaccompanied Minor Registry
| Others |
| UMR | Unaccompanied Minors Registry
| Others |
| UMR | Uncleared Margin Rules
| Others |
| UMR | Under Main Roof
| Others |
| UMR | Underground Media Revolution
| Others |
| UMR | Underground Music Revolution
| Others |
| UMR | Underground Musicians Resource
| Others |
| UMR | Unique Mandate Reference
| Others |
| UMR | Unique Message Reference
| Others |
| UMR | Unit Mail Room
| Others |
| UMR | Unit Manning Report
| Others |
| UMR | Unite Mixte de Recherche
| Others |
| UMR | United for Medical Research
| Others |
| UMR | United Medical Resources
| Others |
| UMR | United Methodist Reporter
| Others |
| UMR | United Mission for Relief
| Others |
| UMR | United Muslim Relief
| Others |
| UMR | Unity Message Repository
| Others |
| UMR | Universal Media Reader
| Others |
| UMR | University of Minnesota Rochester
| Others |
| UMR | University of Missouri Rolla
| Others |
| UMR | University of Missouri, Rolla
| Others |
| UMR | Unlock Machine Room
| Others |
| UMR | Upah Minimum Regional
| Others |
| UMR | Upper Midwest Region
| Others |
| UMR | Upper Mississippi Region
| Others |
| UMR | Upper Mississippi River
| Others |
| UMR | Upstream Message Router
| Others |
| UMR | Urban Mobility Report
| Others |
| UMR | User Management Request
| Others |
| UMR | User Mode Register
| Others |
| UMR | Woomera, South Australia, Australia
| Others |