- U.D.O.
- U.S.Bombs
- Uada
- Übergang
- Udad
- UFO
- Ufoammut
- Ufomammut
- Ufych Stormer
- UGF
- uGLy
- Ugly Again
- Ugly Kid Joe
- Ugly Kings,the
- Ugly Mac Beer
- Ugly Melon
- Ugly Mustard
- Ugly Papas
- Uhrilehto
- Ulcerate
- Ulfhednar
- Uli Jon Roth
- Uli Jon Roth/Electric Sun
- Ulme
- Ulrik Cold
- Ultar
- Ultha
- Ulthar
- Ultima Thule
- Ultimate 16 Originals
- Ultimate Holocaust
- Ultimate Revenge
- Ultimatum
- Ultra Silvam
- Ultra-Violence
- Ultraspank
- Ultraviolence
- Ultrawurscht
- Ulvedharr
- Ulver
- Ulysses Siren
- Ulytau
- Umbra et Imago
- Umbra Vitae
- Un-Kind
- Unanimated
- Unanimated Encoded Anime
- Unantastbar
- Unashamed
- Unblessed Divine
- Unbounded Terror
- Unbreakable Hatred
- Unbroken
- Unchallenged Hate
- Unchecked Aggression
- Uncle Acid & Deadbeats
- Uncle Acid & the Deadbeats
- Uncle Acid and the Deadbeats
- Uncle Fish & The Crypt Kickers
- Uncle Lucius
- Uncle Slam
- Uncovered for Revenge
- Undead
- Undead Corporation
- Undead Creep
- Undead Family,the
- Undead Prophecies
- Undeath
- Undeciphered
- Under a Dying Sun
- Under a Spell
- Under Destruction
- Under My Wheels
- Under Siege
- Under That Spell
- Under the Church
- Under the Drone
- Under the Influence of Giants
- Under the Night Sky
- Under the Oak
- Under the Shroud
- Undercover
- Undercover Bonobos
- Undercover Slut
- Undercovers
- Undergang
- Underground Moon
- Underminded
- Underneath the Gun
- Underøath
- Undertow
- Underwater Sleep Orchestra
- Underwear Serpents
- Underworld Awakening / O.S.T.
- Undish
- Undivine
- Undying Will
- Unearth
- Unearthed Elf
- Unearthly Trance
- Unerathly Trance
- Uneven Structure
- Unexpect
- Unfair Fight
- Unfathomed of Abyss
- Unfelled
- Unfinished Sympathy
- Ungfell
- Ungod
- Unheilig
- Unherz
- Unholy
- Unholy Bible
- Unholy Ghost
- Unholy Grave
- Unholy Land
- Unholy Matrimony
- Unholy Ritual
- Unhuman Disease
- Unida
- Unida:Dozer
- Uniform & the Body
- Union Mac
- Unison Theory
- Unisonic
- Unit 187
- UNIT:187
- United
- United and Strong
- United Blood
- United Enemies
- United Fools
- United Front
- United Future Organization
- United Mind Club
- United Nations
- United Progressive Fraternity
- United Riot Collection
- United State of Mind
- United States of Deception
- United States Of Existenc
- United Underworld
- United We Stand
- Unitopia
- Unity
- Unity, the
- Unity,the
- Universal Theory
- Universally Estranged
- Universe III
- Universe,Fractal
- Unleash the Archers
- Unleash The Sky
- Unleashed
- Unleashed Power
- Unlight
- Ünloco
- Unlord
- Unlucky Morpheus
- Unmerciful
- Unmoored
- Unorthodox
- Unravel
- Unreal Terror
- Unreqvited
- Unrest
- Unruly Child
- Unsane
- Unseen Terror
- Unshine
- UnSun
- Untamed Land
- UnTeachers
- Unter Null
- Untervoid
- Until Death Overtakes Me
- Until I Wake
- Until the End
- Untimely Demise
- Unto Ashes
- Unto Others
- Unto the Wolves
- Untoten
- Unzucht
- Upon a Burning Body
- Upon Arrival
- Upon Stone
- Upon This Dawning
- Upper Lip
- Uprising
- Upsidedown Cross
- Ural
- Uranium USSR 1972
- Uranus
- Urban Dance Squad
- Urchin
- Urethral Defecation
- Urfaust
- Urge Overkill
- Urgehal
- Uriah Heep
- Urkraft
- Urma Sellinger
- URN
- Urn U.S.
- Urna
- Urne
- Us 3
- Us Versus Them
- USA Out of Vietnam
- Usnea
- Usurp Synapse
- Usurper
- Ut New Trolls
- Utbyrd
- Uttertomb
- Uttertomb (Chile)
- Uzala
