| The Original Carter Family |
| The Original Death Row Eastsidaz |
| The Original Five Blind Boys of Alabama |
| The Original Five Blind Boys of Mississippi |
| The Original Glenn Miller Singers |
| The Original Harmony Ridge Creekdippers |
| The Original J.B.s |
| The Original Memphis Five |
| The Original Pied Pipers |
| The Original Salty Dogs |
| The Original Soul Seekers |
| The Original Soul Stirrers |
| The Original Tuxedo Jazz Orchestra |
| The Original Wildcat Jass Band |
| The Original Wolverines |
| The Originals |
| The Orioles |
| The Orlons |
| The Orphan Newsboys |
| The Orwells |
| The Osborne Brothers |
| The Oscar Peterson Trio |
| The Oscar Pettiford Orchestra |
| The Osmond Boys |
| The Osmond Brothers |
| The Osmonds |
| The Oster-Welker Jazz Alliance |
| The Other Ones |
| The Other Thing Brass Band |
| The Other Tribe |
| The Other Two |
| The Others |
| The Others (Aka 22 Pistepirkko) |
| The Out Cast |
| The Out-Islanders |
| The Outback Singers |
| The Outcast |
| The Outcasts |
| The Outfield |
| The Outfit |
| The Outhere Brothers |
| The Outlaws |
| The Outlets |
| The Outline |
| The Outpatience |
| The Outs |
| The Outsiders |
| The Ovations |
| The Overlanders |
| The Overslept |
| The Oversoul 13 |
| The Overtones |
| The Oxford Trinity Choir |
| The Ozark Mountain Daredevils |
| The OMys |
| The P. Raney Coalition |
| The Pablo All-Stars |
| The Pacific |
| The Pacific Jazz Alliance |
| The Pacific Jazzmen |
| The Pack |
| The Pack A.D. |
| The Paddingtons |
| The Pagans |
| The Page Cavanaugh Trio |
| The Pahinui Brothers |
| The Pains of Being Pure at Heart |
| The Paint Sisters |
| The Painted Faces |
| The PAJAM Chorale |
| The Palace Brothers |
| The Palace Orchestra |
| The Paladins |
| The Pale |
| The Paley Brothers |
| The Palladium Orchestra |
| THE PAN |
| The Pandas |
| The Pandemonium Drummers |
| The Pandoras |
