| Abbreviation | Definition |
|---|---|
| UMK | United Methodist Kids |
| UMM | United Methodist Men |
| UMMA | University Muslim Medical Association |
| UMMA | Urban Muslim Minority Alliance |
| UMMAH | United Muslim Movement Against Homelessness |
| UMMS | United Methodist Missionary Society |
| UMPH | United Methodist Publishing House |
| UMR | United Methodist Reporter |
| UMR | United Muslim Relief |
| UMRG | Urban Ministry Resource Guide |
| UMSA | Udruzenje Muslimana Sjeverne Amerike (Serbian: Society of Bosnian Muslims of North America) |
| UMSA | United Muslim Students Association |
| UMSC | Uganda Muslim Supreme Council |
| UMT | United Methodist Temple |
| UMW | United Methodist Women |
| UMWA | United Muslim Women's Association |
| UMY | United Methodist Youth |
| UMYF | United Methodist Youth Fellowship |
| UNCHAPLAIN | Unchaplaincy |
| UNCLE | Utne Network For Communications Letters And Epistles |