- Unreal City (Italian prog band)
- Unrelated Segments
- Unrelica
- Unreqvited (Canadian post‐black metal/shoegaze/ambient)
- Unresolved & Aversion
- 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
- UNSECRET feat. Young Summer
- UNSECRET x BELLSAINT
- UNSECRET, Anna Mae
- UNSECRET, Tinnesz, Sam, Tedashii
- Unseen Dimensions (Javier Martinez Salinas; Psychedelic Trance / Progressive Trance project from Mexico, based in Melbourne, Australia)
- Unseen Faith
- Unseen Guest, The
- Unseen Terror
- Unseen, The (American street punk band)
- Unsenses (Belgian hardstyle producer Gilles Gaspar)
- Unser Sandmännchen
- Unshine (druid metal)
- Unsilence
- Unsleeping, The
- Unsolved, The
- UNSOUND (German rock)
- Unsparing Sea
- Unspoken (American Christian band)
- Unspoken Tradition
- Unspoken Word, The
- UnsraW
- Unstad, Tonje
- Unsteady
- Unstern, Hans
- Unstoppable Fyah
- UnSun
- Unsung Zeros
- Unswabbed (French nu-metal band)
- Untamed (German Rock Band)
- untell
- Unter Ferner Liefen
- Unter Null (Erica Dunham)
- Unter Null & Stray
- UnterART
- Unterbiberger Hofmusik
- Untergangskommando, Das
- Unterschicht
- Untertagen (Germand indie-rock band)
- UnterWortverdacht
- Unthank, Rachel
- Unthank, Rachel & the Winterset
- Unthanks, The
- Untied Shoes (Portuguese Punk Rock Band)
- Until Death Overtakes Me
- Until December
- Until Further Notice (California punk/emo)
- Until I Wake
- Until June
- Until My Heart Beats & Quinto Atlas
- Until Rain
- Until the End (American metalcore band)
- Until the Ribbon Breaks
- Until the Ribbon Breaks & Homeboy Sandman
- Until the Ribbon Breaks & La Pardo
- Until the Ribbon Breaks & Lucius
- Until the Ribbon Breaks & Run the Jewels
- Until the Ribbon Breaks & Wilkins, Emoni
- Until the Ribbon Breaks with Homeboy Sandman
- Until the Ribbon Breaks with Lucius
- Until the Ribbon Breaks with Wilkins, Emoni
- Until We Are Ghosts
- Until We Die
- untiljapan
- Untitled (Japanese idol group)
- untitled (halo)
- Untitled Band Project, The
- Untitled Project of Maks SF
- Unto Ashes
- Unto Others (heavy metal band from Portland, Oregon)
- Unto The Wolves
