Encyclopedias, Almanacs, Transcripts, and Maps
- United Metropolitan Spiritual Churches of Christ
- United Nations Environmental Program
- United Spiritualist Church
- United States Army Medical Research Institute of Infectious Diseases (USAMRIID)
- Units and Standards
- Units and Standards
- Units and Standards
- Unity-and-Diversity World Council
- Univercoelum (Journal)
- Univercolian (Magazine)
- Universal Balm
- Universal Christ Church
- Universal Church of the Master
- Universal Faithists of Kosmon
- Universal Hagar's Spiritual Church (UHSC)
- Universal Harmony Foundation
- Universal Life—The Inner Religion
- Universal Religion of America
- Universal Spiritualist Association
- Universe Quarterly