- Underneath (metallic hardcore)
- Underneath the Gun
- Underoath
- Underoath feat. Ghostemane
- Underscore Orkestra, The (Balkan/Klezmer/Hot Jazz/Americana/Swing band from Portland, Oregon)
- underscores (glitch hop/pop artist)
- underscores (feat. gabby start)
- underscores & gabby start
- underscores feat. 8485
- underscores feat. gabby start
- underscores feat. Knapsack
- underscores feat. Song, Inho
- underscores feat. Young, Maxwell
- underscores ft. Song, Inho
- Undersea Poem
- Undershakers
- UNDERSTATEMENT (punk, Pittsburgh)
- Undertaker, The (Wrestler)
- Undertaking!, The
- undertheskin
- Underthings
- UnderTipper
- Undertones, The (Northern Irish punk rock band)
- Undertow (US hardcore punk band)
- Underwater Circus
- Underwater, The (US alt rock band)
- Underwhelmed
- UnderWill
- Underwood, Carrie
- Underwood, Carrie & Dan + Shay
- Underwood, Carrie & Legend, John
- Underwood, Carrie & Moyer, Stephen
- Underwood, Carrie & Rinehart, Ariane
- Underwood, Carrie & Travis, Randy
- Underwood, Carrie duet with Paisley, Brad
- Underwood, Carrie feat. Ludacris
- Underwood, Carrie feat. Sons of Sylvia
- Underwood, Carrie feat. Travis, Randy
- Underwood, Carrie feat. Winans, CeCe
- Underwood, Carrie with Gill, Vince
- Underwood, Carrie with Legend, John
- Underwood, John (multi-instrumentalist and one man band)
- Underwood, Scott (Christian singer)
- Underworld (UK electronic music group)
- Underworld & Yared, Gabriel
- Undeserving, The
- Undisputed Truth, The
- Undo (Scottish rock band)
- Undoer
- Undrask
- Undrop
- Undurskin (UK hardcore band)
- Undying (American metalcore band)
- Une Misère
- Une touche d'optimisme
- Unearth (metalcore band from Boston, MA)
- Unearthly (Brazillian Blackened Death Metal Band)
- Unearthly Trance
- Uneducated Kid (Korean rapper)
- Uneducated Kid feat. Changmo
- Uneducated Kid feat. Jay Park & Paul Blanco
- Uneducated Kid feat. Paul Blanco & Jay Park
- Uneducated Kid feat. The Quiett
- Unending Thread, The
- Unendlich (USA black metal)
- Uner (DJ & producer)
- Üner, Ersay
- Uneven Structure
- Uneven, The
- Unexist (Italian hardcore DJ and producer Francesco Iapicca)
- Unexist feat. Satronica
- Unextraordinary Gentlemen
- Unfactory
- Unfaithful Ways, The
- unfamouslouie (french beatmaker)
- Unfathomable Ruination
- Unfinished Sympathy, The
- 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
