- Unrest
- Unsane
- Unscarred
- Unsound Menace
- Unspoken Heard ,The
- Unspun
- Unsteady
- UnSunG ZeROS
- Untamed Youth ,The
- Until The End
- Until Whenever
- Unwound
- Unwritten Law
- Up Front
- Up In Arms
- Upbeats ,The
- Uphill Gardeners ,The
- Upper Crust ,The
- Upper Hand
- Upright Citizens
- Uprising Compilations
- Upside Down Cross
- Upside Out
- Upsidedown Cross
- Upsilon Acrux
- Upstart Crow
- Uptown Revival
- Uranium 235
- Uranium 9 Volt
- Uranus Cancelled
- Urban Cookie Collective
- Urban Crush
- Urban Dance Squad
- Urban Dogs
- Urban Dread
- Urban Legends
- Urban Poets Society
- Urban Wenatchee
- Urchin
- Urge ,The
- Urge Overkill
- Uriah Heep
- Urinals
- Urinals ,The
- Ursa Major
- Ursa Minor
- Ursula 1000
- urth
- US
- Us and Wilbur
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- Us3
- Used For Comparison
- Useless ID
- Usher
- Usuals ,The
- Usurper II
- Utah Saints
- Utopia
- Utris
- UZCA
- Uzeda
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