| Uniting Nations | You & Me | — | 128 | — | Gut Records UK | 2005 |
| Uniting Nations ft. Nate James | Mercy | Extended Mix | 130 | — | Sporting Riff Raff | 2011 |
| Unity ft. Amuka, Sly Stone, Bebe & George Clinton | Free The Funk | Explicit | 99 | Urban | Unity Lewis Arts & Entertainment | 2016 |
| Unity ft. Amuka, Sly Stone, Bebe & George Clinton | Free The Funk | Clean Version | 99 | Urban | Unity Lewis Arts & Entertainment | 2016 |
| Unity ft. Stic.Man Of Dead Prez | Let's Ride | — | 78 | — | SoundVise | 2010 |
| Unity ft. Stic.Man Of Dead Prez | Let's Ride | (Explicit) | 77 | Urban | SoundVise | 2010 |
| Universal Agents | West Of Athens | Club Mix | 128 | — | Ovum Recordings | 2000 |
| Universal Xpression | Oohy Aahy | — | 122 | — | Nevus Records | 2006 |
| Unk ft. Andre 3000 & Big Boi | Walk It Out | Instrumental | 80 | — | Big Oomp Koch | 2007 |
| Unk ft. Andre 3000 & Big Boi | Walk It Out | Remix | 80 | — | Big Oomp Koch | 2007 |
|
| Unk ft. Baby D | Hit The Dance Floor | — | 80 | Urban | Big Oomp/KOCH | 2007 |
| Unk ft. Baby D | Hit The Dance Floor | Explicit | 80 | — | Big Oomp/KOCH | 2007 |
| Unkle Adams | I Am Stronger | — | 98 | Urban | The Unkle Adams Entertainment Group | 2014 |
| Unkle Feat. Ian Brown | Be There | Underdog Remix | 108 | — | Ffrr Records/mo Wax | 1999 |
| Unknown Mortal Orchestra | Hunnybee | — | 120 | Alternative | — | 2018 |
| Unladylike | Bartender | — | 68 | Urban | Island Def Jam | 2009 |
| Unlike Pluto ft. Mike Taylor | Everything Black | — | 98 | Electronica | Monstercat | 2017 |
| Unmark | The Silent You | The Mystery Mix | 139 | — | Sirup | 2002 |
| Until The Ribbon Breaks | A Taste Of Silver | — | 88 | Alternative | Strange Loop/Kobalt | 2015 |
| Until The Ribbon Breaks | Revolution Indifference | — | 65 | Alternative | Kobalt | 2015 |
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| Unwritten Law | Cailin | — | 102 | — | Interscope Records | 1999 |
| Unwritten Law | Nevermind | — | 73 | Alternative | Suburban Noize | 2012 |
| Unwritten Law | Rest Of My Life | — | 97 | — | Interscope Records | 2002 |
| Unwritten Law | Save Me | — | 76 | Rock | Lava | 2004 |
| Unwritten Law | Seein' Red | — | 103 | Rock | Interscope Stiff A&M | 2005 |