| Abbreviation | Definition |
|---|---|
| UU | United Unitarians |
| UUA | Unitarian Universalist Association |
| UUAC | Unitarian Universalist Association of Congregations |
| UUC | Unitarian Universalist Church |
| UUC | Unitarian Universalist Congregation |
| UUC | University Unitarian Church |
| UUCA | Unitarian Universalist Congregation of Atlanta |
| UUCC | Unitarian Universalist Church of Chattanooga |
| UUCL | Unitarian Universalist Church of Loudoun |
| UUCP | Unitarian Universalist Congregation of Phoenix |
| UUCP | Unitarian Universalist Congregation of the Palisades |
| UUDPR | Unitarian Universalists for Drug Policy Reform |
| UUF | Unitarian Universalist Fellowship |
| UUFD | Unitarian Universalist Fellowship of Dallas (Oak Cliff), Texas |
| UUFF | Unitarian Universalist Fellowship of Flint, Michigan |
| UUFG | Unitarian Universalist Fellowship of Gainesville, Florida |
| UUFM | Unitarian Universalist Fellowship of Macomb, Illinois |
| UUFMB | Unitarian Universalist Fellowship, Myrtle Beach, South Carolina |
| UUFP | Unitarian Universalist Fellowship of Plattsburgh, New York |
| UUFP | Unitarian Universalist Fellowship of Pottstown, Pennsylvania |