- Unflesh
- Unfoonk
- Unfoonk ft. 24Heavy & Slimelife Shawty
- Unforeseen
- Unforged
- Unforscene (British band, Ben Bower, Benji Muscat, Will Bower)
- Unfortunate Sons
- Unfound Reliance (Swedish Melodic Death Metal and Metalcore Band)
- Unfun (punk rock band)
- Unfyros (Black Metal from Finland)
- Unga, Jordis
- Ungar, Jay & Mason, Molly
- Ungar, Melanie
- Ungar, Ruth
- Ungar, Shmueli (An American Hasidic singer, songwriter and entertainer)
- Ungdomskulen
- Unge Ferrari (Norwegian hip hop)
- Ungemach
- Unger, Flo
- Unger, Justin
- Unger, Remy (Dutch Progressive-House DJ & Producer)
- Unglued (drum & bass artist; Joshua Brown)
- Unglued feat. Durin, Esther
- Ungods
- Ungu
- Unguided, The
- Unguided, The feat. Kürsch, Hansi
- Unhappily Ever Now
- Unheilig
- Unheilig feat. Bourani, Andreas
- Unheilig feat. Licky
- Unheilig feat. Naidoo, Xavier
- Unherz
- Unhindered
- Unholy (Finnish doom metal)
- Unholy Desecration
- Unholy Ghost
- Unholy Grave
- Unholy Matrimony
- Unhuman (Canadian death metal band)
- UNI and the Urchins
- UNI.T
- UNICORN (Japanese rock band)
- Unicorn (’70s rock group, UK)
- Unicorn Heads
- Unicorn Kid
- Unicorn Kid feat. Talk to Animals
- Unicorn on Ketamine
- Unicorns, The
- Unicq
- Unida
- Unidad Trauma
- Unifaun
- Unifics, The (soul group)
- Unified Highway
- Unified Theory (ex-Blind Melon and ex-Pearl Jam alternative rock super group)
- Uniform (industrial/noise rock duo from New York City)
- Uniform Choice
- Uniform Motion
- Uniforms (Spanish dream pop band)
- Uniikki
- Uniikki feat. Cheek
- Uniikki feat. Hookki-Heikk1 & Mikael Gabriel
- Uniikki feat. Iso H
- Uniklubi
- Uninvited (Scottish band)
- Uninvited, The (alternative rock band from LA)
- Uniolla (Japanese band)
- Union (US hard rock supergroup, active late 1990s–early 2000s)
- Union (hip‐hop group from Paris, France)
- Union (Rock, Canada)
- Union 13
- Union Avenue (Scottish country‐rockabilly band)
- Union Carbide Productions (Swedish garage punk band)
- Union feat. eLZhi
- Union J
- Union Jack (UK trance group)
- Union of Knives (Scottish electronic rock band)
- Union of Sinners, The & Saints
- Union of Uranus
- Union Square
- Union Turnpike
- Union Underground, The
- Union Youth
- Union, Beat
- Unión, La
- Union, The (Gospel & Soul group)
- Union, The (UK rock band)
- UNIQ (Chinese-South Korean group)
- uniqlesse
