- Unprocessed
- Unproven (Dutch hardcore dj/producer Stein Bosch)
- Unquiet Nights
- Unrelated Segments
- Unreqvited (Canadian post‐black metal/shoegaze/ambient)
- Unresolved, The (Coventry UK Band)
- Unrest (American indie rock band)
- Unrest (German Metal)
- Unruly Child (American hard rock band)
- Unryal
- UNS (German band)
- Uns e Outros
- Unsafe, Unsound
- Unsainted
- Ünsal, Hande
- Ünsal, Niran
- Unsane (US noise rock trio)
- Unsearchable Riches
- UNSECRET
- UNSECRET & Ruelle
- Unseen Guest, The
- Unseen Terror
- Unseen, The (American street punk band)
- Unsenses (Belgian hardstyle producer Gilles Gaspar)
- Unser Sandmännchen
- Unshine (druid metal)
- Unsilence
- Unsolved, The
- UNSOUND (German rock)
- Unsparing Sea
- Unspoken (American Christian band)
- Unspoken Word, The
- UnsraW
- Unstad, Tonje
- Unsteady
- Unstern, Hans
- UnSun
- Unsung Zeros
- Unswabbed (French nu-metal band)
- Untamed (German Rock Band)
- Untell
- Unter Ferner Liefen
- Unter Null (Erica Dunham)
- UnterART
- Unterbiberger Hofmusik
- Unterschicht
- Untertagen (Germand indie-rock band)
- UnterWortverdacht
- Unthank, Rachel
- Unthank, Rachel & the Winterset
- Unthanks, The
- Until Death Overtakes Me
- Until December
- Until Further Notice (California punk/emo)
- Until I Wake
- Until June
- Until Rain
- Until the End (American metalcore band)
- Until the Ribbon Breaks
- Until the Ribbon Breaks & Lucius
- Until the Ribbon Breaks & Run the Jewels
- Until the Ribbon Breaks & Wilkins, Emoni
- Until We Are Ghosts
- Untiljapan
- untitled (halo)
- Untitled Band Project, The
- Untitled Project of Maks SF
- Unto Ashes
- Unto Others (heavy metal band from Portland, Oregon)
- Untold (UK electronic producer)
- Untoten
- Untouchable (Korean Hip-Hop Group)
- Untouchable 3
- Untouchables, The (Austrian Rhythm & Blues)
- Untouchables, The (mid 80s US ska/mod revival band)
- Untung Sonjaya
- Unturned
- Unusual Demont
- Unusual Suspects (UK hip hop)
- Unveil
- Unverkalt
- Unviar
- UNVS
- Unwanted, The (Irish Band)
- Unwed Sailor
- Unwell
- UNWELL (Rock/pop-punk band)
- Unwind, DJ (American Producer & Remixer)
- Unwinding Hours, The (Scottish alternative rock band)
- Unwoman
