- UNDERHER (UNDERHER was created by Khaled Bess in 2017)
- Underhill Rose (Asheville, North Carolina)
- Underhill, Adrian
- Underhill, Emily
- Underjordiska Lyxorkestern
- Underlined (industrial metal)
- Underminded
- Undermine (Thrash/Death metal band from Argentina)
- Undermine (Hardcore punk band from Kentucky)
- Undermine the Supremacy
- Underneath (metallic hardcore)
- Underneath the Gun
- Underneath, The (UK experimental rock band)
- Underoath
- Underoath feat. Ghostemane
- Underoath feat. Sands, Charlotte
- Unders (Dutch DJ/producer Duncan Meulema based in Ibiza, formerly Amsterdam)
- Undersave (Portuguese Death Metal)
- Underschool Element
- Underscore (Cheltenham Band)
- Underscore Orkestra, The (Balkan/Klezmer/Hot Jazz/Americana/Swing band from Portland, Oregon)
- underscores (glitch hop/pop artist)
- underscores (feat. gabby start)
- underscores feat. 8485
- underscores feat. gabby start
- underscores feat. Knapsack
- underscores feat. Song, Inho
- underscores feat. Young, Maxwell
- underscores ft. 8485
- underscores ft. Song, Inho
- Undersea Poem
- Undershakers
- Underside (Nepal band)
- Undersmile
- UNDERSTATEMENT (punk, Pittsburgh)
- Undertaker, The (Wrestler)
- Undertaking!, The
- Underthings
- UnderThreat
- UnderTipper
- Undertones (Toronto, Canada) (Hardcore punk band from Toronto, Canada.)
- Undertones, The (Northern Irish punk rock band)
- Undertow (US hardcore punk band)
- Undertow (German thrash metal)
- Undertow, The feat. Bull, Linda
- Underwater Basket Weaving
- Underwater Circus (German alternative rock band)
- Underwater Pilots
- Underwater, The (US alt rock band)
- Underwhelmed
- UnderWill
- Underwing
- Underwolves, The
- Underwood
- 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 featuring Fisher, Isaiah
- Underwood, Carrie with Gill, Vince
- Underwood, Carrie with Legend, John
- Underwood, John (multi-instrumentalist and one man band)
- Underwood, Ricky James
- Underwood, Scott (Christian singer)
- Underworld (UK electronic music group)
- Underworld / Fatboy Slim
- Underworld & Pop, Iggy
- Underworld, The (UK jungle/drum & bass artist)
- Undeserving, The
- Undesirables, The (Canadian Folk Cabaret)
- Undinyx
- Undisputed Truth, The
- Undivine, The (Finnish death metal & hardcore punk band)
- Undo (Scottish rock band)
- UNDO (Vaporwave producer)
- Undo (Brazilian rock band)
- Undo K From Hot
- Undoer
- Undrask
- Undrop
- Undurskin (UK hardcore band)
- Undying (American metalcore band)
- Undying Inc (Metal band from New Delhi, India)
