UB
- Bakrie University
- Basel University Library
- Berezin UB
- Brawijaya University
- Church of the United Brethren in Christ
- German Type UB submarine (disambiguation)
- German submarine UB
- Myanmar National Airlines
- OOB (disambiguation)
- The Urantia Book
- U of B (disambiguation)
- U.S. Bitonto
- U.S.C. de Bananier
- UB postcode area
- UBS (disambiguation)
- Ub (river)
- Ub Iwerks
- Ub, Serbia
- Ubiquitin
- Ubo (disambiguation)
- Ubu (disambiguation)
- Ugly Betty
- Ulaanbaatar
- UltimateBet
- Undefined behavior
- Ungermann-Bass
- United Biscuits
- United Breweries Group
- Universal Beam
- University at Buffalo
- University of Baguio
- University of Ballarat
- University of Baltimore
- University of Barcelona
- University of Basrah
- University of Batangas
- University of Belgrade
- University of Belgrano
- University of Birmingham
- University of Bohol
- University of Botswana
- University of Brawijaya
- University of Bridgeport
- University of Bucharest
- University of Buckingham
- University of Buea
- University of Burgundy
- University of the Bahamas
- Upper and lower bounds
- Upward Bound
- Urban Behavior
- Urząd Bezpieczeństwa