- Union Underground, The
- Union Youth
- Union, Beat
- Unión, La
- Union, The (Gospel & Soul group)
- Union, The (UK rock band)
- Union, The (Australian band from late 1990s, early 2000s)
- Uniones (Argentinean post-hardcore band)
- UNIONS (japanese band)
- Unions (indie duo?)
- UNIQ (Chinese-South Korean group)
- uniqlesse
- Uniqo
- Uniqplan
- Unique (Hungarian synth-pop, electro-pop group)
- Unique 3 (UK Bleep/Techno/Bass pioneers)
- Unique II
- Unique, Dominique Young
- Uniquegodx
- Uniques, The (Jamaican rocksteady vocal trio)
- Uniques, The (late 1960s US garage rock/R&B band from Louisiana)
- Uniques, The (Slovak band - changed name to Nvmeri after 2013)
- UNIS (South Korean girl group)
- Unisex, The
- Unison (Young producer of EDM born in Switzerland)
- UNISON SQUARE GARDEN
- Unisonic
- UniSono (University Choir of Paderborn)
- UNIST
- Unit (Bolivian Group)
- Unit 4+2
- Unit 406
- UNIT BLACK
- Unit Five (Norwegian pop band)
- Unit Gloria (Dutch 60's and 70's pop group)
- Unit Wail
- Unit, The
- Unit, Vortex
- Unit:187
- Unitary
- Unitaskers, The (Milwaukee indie rock)
- Unite (Danish boyband)
- UNiTE
- Unite Against Society (Belgian punk band)
- United (Hungarian funk‐rock)
- United Balls
- United Citizen Federation
- United Flavour (Czech reggae group)
- United Fools (instrumental eletro-jazz band from Bordeaux, FR)
- United Freedom Collective
- United Future Organization
- United in Dance Feat. Lisa Marie
- United Musik (Colombian Christian music band)
- United Nations (hardcore punk supergroup from USA)
- United Progressive Fraternity
- United Pursuit
- United Pursuit feat. Andrea Marie
- United Pursuit feat. Human, Brock
- United Pursuit feat. Reagan, Will
- United Rave Orchestra
- United Sacred Harp Musical Association
- United Soul
- United State of Electronica
- United States Air Force Band of Liberty (Hanscom Air Force Base)
- United States Air Force Band, The
- United States Air Force Band, The and Singing Sergeants
- United States Air Force Concert Band
- United States Air Force Heritage of America Band
- United States Air Force Singing Sergeants, The
- United States Army Band, The
- United States Army Field Band Jazz Ambassadors, The
- United States Marine Band
- United States Marine Band, "The President's Own"
- United States Marine Corps
- United States Navy Band
- United States of America, The (American psychedelic rock band)
- United Studio Orchestra
- United Vibrations
- United Voice Worship
- United, Puffballs (videogame developer aka PuffballsUnited)
- United, Summerfield & Kreisligalegende
- United, Summerfield und Kreisligalegende
- UniteUp
- UNITEX (Luso-Angolan Hip Hop and R&B Group)
- Uniting Nations
- Uniting Nations feat. More, Laura
- Unitopia
- Units (San Francisco synthpunk band, 1978-1984)
- Unity (US hardcore punk band)
- Unity (UK house duo Paul Witts & Robert Manley)
