UBB or Ubb may refer to:
Education Babeș-Bolyai University in Cluj-Napoca, Romania University of Bangka Belitung in Pangkalpinang, Indonesia University of Bío Bío in Chile
Media Ultimate Big Brother, British reality television show Ultimate Breaks and Beats, a series of compilation albums Usage Based Billing (UBB), a Canadian Radio-television and Telecommunications Commission regulation allowing Internet service providers to charge customers per gigabyte transferred
Science and technology BBCode text documents formatting ( '[b]bold[/b]' etc.) Ubiquitin B gene Unbibium, symbol Ubb for '122', a theoretical chemical element
Other uses Union Bordeaux Bègles, a French rugby union team United Bulgarian Bank Usedomer Bäderbahn, a German regional railway serving the spa towns on the German and Polish island of Usedom Mabuiag Island Airport, IATA airport code "UBB"