- U Totem
- U'Snake
- U-MANWORKS
- U.K.
- U.P.
- U.S. Girls
- U.S. Maple
- U.S.U.R.A.
- UAP
- Ubi Maior
- Ubikar
- UEBERSCHAER
- UEL
- UFO
- UFO Hawaii
- Ufomammut
- Ugler i mosen
- Ujig
- Ukranium
- Ulan Bator
- Ulas Yavuz
- Uli Jon Roth
- Ulrich
- Ulrike Haage
- Ultima Forma
- Ultima Radio
- Ultime Atome
- Ultra Virtual Prog Band
- Ultralyd
- Ultramar
- UltraMega
- Ultranova
- Ultraphonic
- Ultraphonix
- Ultraschall
- Ultrasonic Attack Wave Pestrepeller
- Ultravox
- Ulver
- Umaiz Baig
- Umayr Dogar
- Umphrey's McGee
- Un Certo Jhò
- Un millón de hectáreas
- Una Nación Llamada Basura
- Una Stagione all'Inferno
- Unbalance
- Unbeing
- Unborned
- Uncanny
- Uncle Dog
- Unda Alunda
- Under
- Under Byen
- Under Old Trees
- Under The Skin
- Undercover Monks
- Underfate
- Undergrünnen
- UnderMe
- Undertable Dreams
- UnderTone
- Une Ile Perdue
- Uneven Eleven
- Unexpected Heroes
- Ungambikkula
- Ungdomskulen
- Uni
- Unicorn
- Union Wireless
- Unisonic
- United Mecca
- United States Of America
- Unitopia
- Univers Zéro
- Universal Congress Of
- Universal Distress Signal
- Universal Totem Orchestra
- Universe Manifesto
- Unknown Connection Failure
- Unknown Instructors
- Unknown Painter
- Unknown Ways
- Unmask
- Uno
- Uno Svenningsson
- Unprogressive
- Unreal City Prog Band
- Unredd
- Uns
- Unsilenced
- Uns
- Unsilenced
- Unstoppable Force
- Unter den Linden
- Until I Breathe
- Until Rain
- Untitled Virtual Ensemble
- Unwed Sailor
- Unzion
- Upcdownc
- Uphill Work
- Uppfriska
- Uppgång & Fall
- Uppsala
- Upsilon Acrux
- Upstairs
- Uptempo Stories
- Uptighty
- Ur-Instinkt
- URANIA
- Urania
- Urban Fictions
- Urban Heep
- Urban noise productions
- Urdog
- Uri Geller
- Uriah Heep
- Ursa
- URSS Bajo el Árbol
- Us and Them
- US Maple
- USA
- User
- Uske Orchestra
- Uské Orchestra
- UT New Trolls
- Utopia
- Utopia 239
- Utopianisti
- Utotem
- UV Sir J
- Uz Jsme Doma
- Uzay Gök
- Uzeda