- Umse (German Rapper)
- Umse feat. Aphroe
- Umse feat. Dike
- Umse feat. Jokaz
- Umse feat. Masta Ace
- Umse feat. Megaloh
- Umse feat. Pimf & Abroo
- Umse feat. Rheza
- UMX
- UmYull
- Umziky (Instrumentalist/producer Johannes Granroth)
- UN (South Korean duo)
- Un (Indie Rock)
- UN (Finnish rock band)
- Un Blonde
- Un Drame Musical Instantané
- Un Kuartito
- Un tal Lucas
- Un Verano
- Un Viejo Arcoiris (Peruvian emo / punk band)
- Un‐Cut (drum & bass group, track “Midnight”)
- Un‐Ti
- UN, The (US hip hop group assoc. with Pete Rock)
- UNA (downtempo electronica group from Los Angeles)
- Una Canción Bonita
- Una Mas
- Una Mas Trio
- UNA MIA (Alt pop R&B singer songwriter from Toronto)
- Unable to Fully Embrace This Happiness (Emoviolence/Screamo band)
- Unabomb (Artist from Michigan)
- Unabomber (Brazilian punk band)
- Unagi
- Ünal, Alperen (Alperen Remzi Ünal)
- Unalei
- UnAlfabet
- Unamerican
- Unamused Dave
- Unanimated
- Unantastbar
- Unashamed
- UNAVERAGE GANG
- UNAVERAGE GANG feat. Schizo
- UNB
- Unbalance (Korean Group)
- Unband, The
- Unbeheld, The (Heavy psychedelic rock band from Memphis, TN)
- Unbelievable Truth
- Unbending Trees, The
- Unbending Trees, The Featuring Thorn, Tracey
- Unblock
- unBORDE all stars
- Unbound (dubstep)
- Unbounded
- Unbowed
- Unbreakable (German Hard Rock group)
- Unbreakable Hatred (Death Metal band form Quebec)
- Unbroken (US metalcore/hardcore punk band)
- Unbroken Expanse (Northern Territory, Australia rock band)
- Unbroken Reign (North Texas Christian metalcore band)
- Unbunny
- Unburier (UK Death Metal Band)
- Unbuttoned
- uncalc
- Uncanny (Swedish death metal)
- Uncanny Alliance
- Uncanny X-Men
- Uncarnate (synthpop)
- Uncaught in Promise
- UNCHAIN (Japanese rock band)
- Unchained (UK Punk)
- Uncharted Shores (California band, formerly known as One Direction)
- Uncharted, The
- Unchosen Ones
- Unción Tropical (Christian music band)
- Uncle Acid & The Deadbeats
- Uncle Al, DJ
- Uncle Bard & The Dirty Bastards
- Uncle Bard and The Dirty Bastards
- Uncle Black (UK band Les King / Mike Aldridge / Paul Ashworth)
- Uncle Bonsai
- Uncle Brian
- Uncle Charlie
- Uncle Chris
- Uncle Deadly (The solo project of Kaizers Orcestra's Geir Zahl.)
- Uncle Devil Show, The
- Uncle Earl
- Uncle Ezra Ray
- Uncle Green
- Uncle Ho
- Uncle Jake & the 18 Wheel Gang (UJ18 is banjo-clangin' folk music from Pennsylvanian Appalachia.)
