| Abbreviation | Definition |
|---|---|
| USGN | United States Gospel News |
| USIM | University Sains Islam Ma |
| USIW | Universal Society of the Integral Way |
| USM | United Spirits Meet |
| USMB | United States Mormon Battalion |
| USNA | United Service for New Americans (religious resettlement agency; est.1946) |
| USNH | Unitarian Society of New Haven |
| USP | Unexplained Spiritual Phenomenon |
| USPG | The United Society for the Propagation of the Gospel |
| USQ | Universal Spirit Quest |
| UT | University of Tomorrow |
| UTFT | Under The Fig Tree |
| UTFW | Unknown Truth Fellowship Worker |
| UTJ | Union for Traditional Judaism |
| UTJ | United Torah Judaism |
| UTO | United Thank Offering |
| UTR | Upon The Rock |
| UTT | United Talmud Torah |
| UU | Unitarian Universalism |
| UU | Unitarian Universalist |