| Artist | Title | Release Year | Length | Genre | Label | Format | Tracks |
|---|---|---|---|---|---|---|---|
| U.N.K.L.E | Psyence Fiction | 1998 | 54:57 | Hip Hop | Mowax Recordings | CD | 12 |
| U.S. (United Soul) | Music With Funkadelic | 2009 | 32:46 | Funk | Westbound Records | CD | 7 |
| U.S. Christmas | Salt The Wound | 2006 | 60:37 | Rock | RAIG | CD | 10 |
| U.S. Christmas | Eat The Low Dogs | 2008 | 55:50 | Rock | Neurot Recordings | CD | 9 |
| U.S. Christmas | Run Thick In The Night | 2010 | 76:38 | Rock | Neurot Recordings | CD | 13 |
| UFO | The Decca Years | 1993 | 77:12 | Rock | Repertoire Records | CD | 18 |
| Ufomammut | Godlike Snake | 2000 | 56:53 | Metal | Beard Of Stars Records | CD | 9 |
| Ufomammut | snailking | 2003 | 68:54 | Metal | The Music Cartel | CD | 8 |
| Ufomammut | Lucifer Songs | 2005 | 24:59 | Metal | Rocket Recordings | CD | 5 |
| Ufomammut | Idolum | 2008 | 66:00 | Metal | Supernatural Cat | CD | 7 |
| Ufomammut | Eve | 2010 | 44:41 | Metal | Supernatural Cat | CD | 5 |
| Ufomammut | Oro: Opus Alter | 2012 | 42:55 | Metal | Neurot Recordings | CD | 5 |
| Ufomammut | Oro: Opus Primum | 2012 | 51:03 | Metal | Neurot Recordings | CD | 5 |
| Ufomammut/Lento | Supernaturals Record One | 2007 | 40:18 | Rock | Supernatural Cat | CD | 6 |
| Ugh! | Metaustrat | 2003 | 52:51 | Rock | Elektrohasch Schallplatten | CD | 9 |
| Ugh! | Meat Fairies | 2005 | 45:47 | Rock | Elektrohasch Schallplatten | CD | 13 |
| Ugh! | Waste | 2012 | 58:15 | Rock | Elektrohasch Schallplatten | CD | 13 |
| Ugly Custard | Ugly Custard | 1971 | 39:34 | Rock | Relics | CD | 14 |
| Ugly Kid Joe | As Ugly As They Wanna Be | 1991 | 25:22 | Rock | Stardog | CD | 6 |
| Ugly Kid Joe | America's Least Wanted | 1992 | 59:18 | Rock | Stardog | CD | 13 |
| Ukrania | The Maiden | 2010 | 44:52 | Rock | Ukrania | CD | 12 |
| Ultra | Ultra | 2007 | 65:13 | Rock | Rockadrome | CD | 16 |
| Ultralyd | Inertiadrome | 2010 | 40:43 | Rock | Rune Grammofon | CD | 5 |
| Ultraphallus | Sowberry Hagan | 2010 | 40:41 | Rock | Riot Season | CD | 11 |
| Umberto | Prophecy Of The Black Widow | 2010 | 43:58 | Rock | Not Not Fun Records | CD | 8 |
| Underdogs | Ready To Burn | 2007 | 43:56 | Rock | Go Down Records | CD | 10 |
| The Underdogs | Wasting Our Time | 1970 | 37:28 | Rock | Skyf Zol | CD | 10 |
| The Underground Failure | The Underground Failure | 1971 | 38:52 | Rock | Black Light | CD | 12 |
| The Undisputed Truth | Higher Than High | 1975 | 38:26 | Soul | Gordy | LP | 9 |
| Unida | Coping With The Urban Coyote | 1999 | 41:00 | Rock | Man's Ruin Records | CD | 8 |
| Unida/Dozer | Unida/Dozer Split EP | 1999 | 36:16 | Rock | MeteorCity Records | CD | 8 |
| Union 69 | Holiday 2000 | 2000 | 30:21 | Rock | Bad Afro Records | CD | 12 |
| Union Carbide Productions | Financially Dissatisfied Philosophically Trying | 1989 | 50:03 | Rock | Radium 226.05 Records | CD | 11 |
| Union Carbide Productions | In The Air Tonight | 1989 | 40:05 | Rock | Radium 226.05 Records | CD | 10 |
| Union Carbide Productions | From Influence To Ignorance | 1991 | 48:43 | Rock | Radium 226.05 Records | CD | 10 |
| Union Carbide Productions | Swing | 1992 | 64:20 | Rock | Radium 226.05 Records | CD | 13 |
| Union Carbide Productions | Remastered To Be Recycled | 2004 | 77:43 | Rock | Push Music Group | CD | 18 |
| Univerzals, The | Ocean Of Light | 2009 | 78:19 | Rock | CD | 12 | |
| Up-Tight & Makoto Kawabata | Up-Tight & Makoto Kawabata | 2005 | 67:51 | Rock | Galactic Zoo Disc | CD | 6 |
| Uran | Uran | 2009 | 43:05 | Rock | Sulatron | CD | 15 |
| Urge Overkill | Saturation | 1993 | 69:55 | Rock | Geffen | CD | 12 |
| Uriah Heep | ...Very 'eavy ...Very 'umble | 2003 | 79:53 | Rock | Sanctuary Records | CD | 16 |
| uton | Suoniin, Luihin, Ytimiin | 2005 | 46:29 | Rock | Ikuisuus | CD | 1 |
| uton | Mystery Revolution | 2006 | 41:22 | Rock | Digitalis Recordings | CD | 9 |
| uton | Sacred Hiss/Ghost Oracle | 2006 | 35:59 | Rock | Ikuisuus | CD | 10 |
| Uton & Valerio Cosi | Käärmeenkääntopiiri | 2007 | 39:18 | Rock | Fire Museum Records | CD | 4 |
| Utopia | Utopia | 1970 | 45:59 | Rock | Akarma Records | CD | 11 |