Encyclopedias, Almanacs, Transcripts, and Maps
- Unger, Max
- Ungerfeld, Moshe
- Ungerman, Irving
- Unicity of God
- Unicity of the Church
- Uniformity
- Unigenitus
- Union County
- Union Générale Des IsraéLites de France
- Union of Councils for Jews in the Former Soviet Union
- Union of Orthodox Jewish Congregations of America
- Union of Orthodox Rabbis of the United States and Canada
- Union of Reform Judaism
- Union of Sephardic Congregations, the
- Union of the Russian People
- Union, Oesterreichisch-Israelitische
- Unitarian Universalist Association
- Unitarians
- United Arab Emirates, The Catholic Church in
- United Brethren