Artist | Title | Released |
| Wink O'Bannon | For A Life Of Sin: A Compilation Of Insurgent Chicago Country | 1994 |
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| Hugh O'Brian with Ken Darby's Orchestra and Chorus | Songs Of The West, Vol. 4: Movie & Television Themes | 1993 |
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| Tim O'Brien | The Songs Of Dwight Yoakam: "Will Sing For Food" | 1998 |
| | A Tribute To John Hartford: Live From Mountain Stage | 2001 |
| | This Is Where I Belong: The Songs Of Ray Davies & The Kinks | 2002 |
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| The Ocapellos | Street Corner Essentials, CD 2: The Rare Sides | 2001 |
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| Ric Ocasek | The Bottom Line: "...A Bunch Of Songwriters Sitting Around Singing" | 1995 |
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| Eliades Ochoa | Sublime Ilusion | 1999 |
| | The I-10 Chronicles | 2000 |
| | Estoy Coma Nunca | 2002 |
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| Phil Ochs | The War Is Over: The Best Of Phil Ochs | 1988 |
| | Troubadours Of The Folk Era, Volume 2 | 1992 |
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| Maura O'Connell | Philo So Far... The 20th Anniversary Folk Sampler | 1994 |
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| P.J. O'Connell | Happy Go Lucky | 2002 |
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| Nora O'Connor | Down To The Promised Land: 5 Years Of Bloodshot Records (Disc 2) | 2000 |
| | Hard-Headed Woman: A Celebration Of Wanda Jackson | 2004 |
| | For A Decade Of Sin: 11 Years Of Bloodshot Records (Disc 2) | 2005 |
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| Nora O'Connor and Steve Frisbie | The Bottle Let Me Down: Songs For Bumpy Wagon Rides | 2002 |
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| Sinead O'Connor | So Far... The Best Of Sinead O'Connor | 1997 |
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| Sinéad O'Connor | Common Ground: Voices Of Modern Irish Music | 1996 |
| | "Long Journey Home" Original Soundtrack | 1998 |
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| W. Lee O'Daniel and His Hillbilly Boys | Doughboys, Playboys And Cowboys: The Golden Years Of Western Swing - Disc 2, Playboy Stomp | 1999 |
| | Doughboys, Playboys And Cowboys: The Golden Years Of Western Swing - Disc 3, Tobacco State Swing | 1999 |
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| Anita O'Day | A Night Out With Verve - Disc 1, Wining | 2000 |
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| Odetta | Troubadours Of The Folk Era, Volume 1 | 1992 |
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| The Chico O'Farrill Orchestra | More Than Mambo: The Introduction To Afro-Cuban Jazz (Disc 1) | 1995 |
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| Chico O'Farrill and His Orchestra | More Than Mambo: The Introduction To Afro-Cuban Jazz (Disc 2) | 1995 |
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| Ohio Express | Billboard Top Rock'N'Roll Hits - 1968 | 1993 |
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| Oingo Boingo | Monsters, Ghouls, Goblins & Demons: The Essential Halloween Party Collection | 1999 |
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| The O'Jays | In Yo' Face! The History Of Funk, Vol. 3 | 1993 |
| | The 30th Anniversary Concert Celebration (Disc 2) | 1993 |
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| Babatunde Olatunji | Around The World (For A Song) | 1991 |
| | The Big Bang: In The Beginning Was The Drum (Disc 3) | 1994 |
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| Old 97's | Hell-Bent: Insurgent Country Volume 2 | 1995 |
| | Down To The Promised Land: 5 Years Of Bloodshot Records (Disc 1) | 2000 |
| | For A Decade Of Sin: 11 Years Of Bloodshot Records (Disc 2) | 2005 |
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| Oliver | Baby Boomer Classics, Disc 3: Mellow Sixties | 1993 |
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| David Olney | Philo So Far... The 20th Anniversary Folk Sampler | 1994 |
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| Kristina Olsen | Philo So Far... The 20th Anniversary Folk Sampler | 1994 |
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| Carla Olson | The Watermelon Sampler Vol. 1 | 1995 |
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| Mark Olson with Victoria Williams | Real: The Tom T. Hall Project | 1998 |
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| Omar and The Howlers | The Watermelon Sampler Vol. 1 | 1995 |
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| One Riot One Ranger | Straight Outta Boone County | 1997 |
| | The Bottle Let Me Down: Songs For Bumpy Wagon Rides | 2002 |
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| Jimmie O'Neal and The Colorado Hillbillies | Hillbilly Boogie, Disc 1: Travelling Boogie | 2002 |
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| Yoko Ono | Radio Free: Cult Cuts That Were Too Cool For Radio | 1998 |
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| Gene O'Quinn | Hillbilly Boogie, Disc 1: Travelling Boogie | 2002 |
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| Roy Orbison | In Dreams: The Greatest Hits | 1987 |
| | For The Lonely: 18 Greatest Hits | 1988 |
| | Mystery Girl | 1989 |
| | The Sun Years | 1989 |
| | King Of Hearts | 1992 |
| | Max Weinberg Presents: Let There Be Drums! Vol. 2: The '60s | 1994 |
| | The Best Of Austin City Limits: Legends Of Country Music | 1997 |
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| Roy Orbison and Friends | A Black And White Night Live | 1989 |
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| Roy Orbison and The Roses | The Sun Story | 1987 |
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| Roy Orbison and The Teen Kings | The Sun Story | 1987 |
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| Roy Orbison with k.d. lang | King Of Hearts | 1992 |
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| The Orbits | Street Corner Essentials, CD 2: The Rare Sides | 2001 |
| | Brown Eyed Handsome Man: St. Louis Salutes The Father Of Rock & Roll | 2004 |
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| Orchestra and Chorus conducted by David Buttolph | Songs Of The West, Vol. 4: Movie & Television Themes | 1993 |
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| Orchestra Of Chinese Central Music College | The Big Bang: In The Beginning Was The Drum (Disc 3) | 1994 |
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| The Original Casuals | Street Corner Essentials, CD 1: The Hits | 2001 |
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| The Original Dixieland Jazz Band | The Engine Room: A History Of Jazz Drumming - Volume 1, New Orleans & Chicago Styles | 1999 |
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| The Originals | Billboard Top R&B Hits - 1969 | 1989 |
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| Orquestra Was | Forever's A Long, Long Time | 1997 |
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| The Osborne Brothers and Red Allen | Appalachian Stomp: More Bluegrass Classics | 1999 |
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| Joan Osborne | Relish | 1995 |
| | How Sweet It Is | 2002 |
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| Johnny Otis Orchestra | Rockin' & Rollin' Wedding Songs, Vol. 1 | 1992 |
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| Johnny Otis Quintette (with The Robins and Little Esther) | Blues Masters, Volume 1: Urban Blues | 1992 |
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| Johnny Otis | The New Johnny Otis Show with Shuggie Otis | 1981 |
| | Dancing At The Nick At NiteClub | 1997 |
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| The Outlaws | Monster Hits: 10 Classic Songs To Rock Your Halloween | 1997 |
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| Gwil Owen | Rig Rock Juke Box | 1992 |
| | Rig Rock Truck Stop | 1993 |
| | Hell-Bent: Insurgent Country Volume 2 | 1995 |
| | Nashville: The Other Side Of The Alley: Insurgent Country Volume 3 | 1996 |
| | Magnetic Heaven | 1999 |
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| Buck Owens | The Very Best Of Buck Owens, Volume 1 | 1994 |
| | The Very Best Of Buck Owens, Volume 2 | 1994 |
| | Hillbilly Fever! Vol. 4: Legends Of The West Coast | 1995 |
| | The Best Of Austin City Limits: Legends Of Country Music | 1997 |
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| Buck Owens and His Buckaroos | Rig Rock Deluxe: A Musical Salute To The American Truck Driver | 1996 |
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| Tex Owens | Songs Of The West, Vol. 1: Cowboy Classics | 1993 |
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