Encyclopedias, Almanacs, Transcripts, and Maps
- Uncompahgre Peak
- underground coal mining
- Understanding Genetics
- Underwood, Oscar Wilder
- undulant fever
- Unfederated Malay States
- Ungava
- Ungava Bay
- Unimak
- Union League Clubs
- Union of Burma
- Unión, La
- Uniondale
- Uniontown
- Unitarian Universalist Association
- Unitas Fratrum
- United Brethren in Christ
- United Church of Canada
- United Colonies of New England
- United Kingdom of Great Britain and Northern Ireland