Encyclopedias, Almanacs, Transcripts, and Maps
- Ukrainians
- Ukrainians of Canada
- Ulate Blanco, Otilio (1891–1973)
- Ulloa, Antonio de (1716–1795)
- Ulrich (Engelbert) of Strasbourg (fl. 1248–1277)
- ULSTER ENGLISH
- Ultimate Frisbee
- Umaña Bernal, José (1899–1982)
- Umayyad Mosque
- Umm al-Qura University
- Umm Naʿsan
- Umma Party
- Unamuno y Jugo, Miguel de (1864–1936)
- Unanue, Hipólito (1755–1833)
- Underdetermination Thesis, Duhem-Quine Thesis
- Ungo, Guillermo Manuel (1931–1991)
- Unicato
- Unified Central of Workers (CUT)
- Union Club
- Unión de Armas