Artist | Title | Released |
| Paul Oakley and The Maranatha! Singers | iWorship: A Total Worship Experience (Disc 1) | 2002 |
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| Oasis | (What's The Story) Morning Glory? | 1995 |
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| The Oblivians | Songs We Taught The Detroit Cobras (Disc 1) | 2008 |
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| Tim O'Brien | Will Sing For Food - The Songs Of Dwight Yoakam | 1998 |
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| Ocean | Super Hits Of The '70s: Have A Nice Day, Vol. 4 | 1979 |
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| Billy Ocean | Super Hits Of The '70s: Have A Nice Day, Vol. 23 | 1979 |
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| Eliades Ochoa | Buena Vista Social Club | 1997 |
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| Eliades Ochoa, Ibrahim Ferrer and Manuel "Puntillita" Licea | Buena Vista Social Club | 1997 |
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| Rich Ochoa and The Maranatha! Promise Band | iWorship: A Total Worship Experience (Disc 2) | 2002 |
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| Phil Ochs | Vietnam: Songs From The Divided House (Disc 2) | 1972 |
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| Helen O'Connell | Anything Goes: Capitol Sings Cole Porter | 1965 |
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| P.J. O'Connell | Chinese Surprise #22 - Mix CD #2 | 2006 |
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| P.J. O'Connell with NRBQ | Free Sounds: The Miles Of Music Sampler #3 | 2003 |
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| Nora O'Connor | Hard-Headed Woman: A Celebration Of Wanda Jackson | 2004 |
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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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| Sinéad O'Connor | The Lion And The Cobra | 1987 |
| | I Do Not Want What I Haven't Got | 1990 |
| | Red Hot + Blue: A Tribute To Cole Porter To Benefit AIDS Research And Relief | 1990 |
| | Am I Not Your Girl? | 1992 |
| | So Far...The Best Of Sinead O'Connor | 1994 |
| | Universal Mother | 1994 |
| | Faith And Courage | 2000 |
| | Sean-Nós Nua | 2002 |
| | She Who Dwells In The Secret Place Of The Most High Shall Abide Under The Shadow Of The Almighty (Disc 1) | 2003 |
| | She Who Dwells In The Secret Place Of The Most High Shall Abide Under The Shadow Of The Almighty (Disc 2) | 2003 |
| | Throw Down Your Arms | 2005 |
| | Theology (Disc 1 - The Dublin Sessions) | 2007 |
| | Theology (Disc 2 - The London Sessions) | 2007 |
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| W. Lee O'Daniel and His Hillbilly Boys | Doughboys, Playboys and Cowboys: Golden Years of Western Swing, Vol. 2 | 1947 |
| | Doughboys, Playboys and Cowboys: Golden Years of Western Swing, Vol. 3 | 1947 |
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| Alan O'Day | Super Hits Of The '70s: Have A Nice Day, Vol. 19 | 1979 |
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| Anita O'Day | Great American Songwriters, Vol. 1: George & Ira Gershwin | 1989 |
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| Brooks O'Dell | Birth Of Soul Volume 3 | 1964 |
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| Off Broadway USA | Miscellaneous Songs | 1979 |
| | DIY: Shake It Up! - American Power Pop II (1978-80) | 1980 |
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| Ohio Express | Cameo Parkway 1957-1967 (Disc 4) | 1967 |
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| Ohio Players | First Impressions | 1968 |
| | Observations In Time | 1968 |
| | Trespassin' | 1969 |
| | Pain | 1971 |
| | Pleasure | 1972 |
| | Ecstasy | 1973 |
| | Orgasm: The Very Best Of The Westbound Years | 1974 |
| | Skin Tight | 1974 |
| | Fire | 1975 |
| | Honey | 1975 |
| | Contradiction | 1976 |
| | Gold | 1976 |
| | Angel | 1977 |
| | Mr Mean | 1977 |
| | Funk On Fire: The Mercury Anthology (Disc 1) | 1978 |
| | Funk On Fire: The Mercury Anthology (Disc 2) | 1978 |
| | Jass-Ay-Lay-Dee | 1978 |
| | Everybody Up | 1979 |
| | Tenderness | 1981 |
| | Ouch! | 1982 |
| | Jam | 1996 |
| | Tying The Knot | 2001 |
| | Funk In The Trunk (Disc 1) | 2007 |
| | Funk In The Trunk (Disc 2) | 2007 |
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| OHN | The Not-So-White Album | 2008 |
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| Oingo Boingo | Like, Omigod!: The '80s Pop Culture Box (Totally) (Disc 6) | 1989 |
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| The O'Jays | Beg, Scream & Shout! The Big 'Ol Box Of '60's Soul - Scream 1 | 1969 |
| | Have A Merry Chess Christmas | 1969 |
| | Back Stabbers | 1972 |
| | Believe In Music | 1972 |
| | Love Train: The Best Of The O'Jays | 1976 |
| | Tying The Knot | 2001 |
| | Funk In The Trunk (Disc 2) | 2007 |
| | Rachel And Dave's Wedding Celebration Disc 3 | 2007 |
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| The O'Kaysions | Beg, Scream & Shout! The Big 'Ol Box Of '60's Soul - Scream 2 | 1969 |
| | Summer Come Loudly | 2003 |
| | One In Vermillion: Imaginary Radio - Mix CD #3 | 2006 |
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| Danny O'Keefe | Miscellaneous Songs | 1972 |
| | Super Hits Of The '70s: Have A Nice Day, Vol. 17 | 1979 |
| | Under The Covers & Originals | 2007 |
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| Johnny O'Keefe | The Birth Of Australian Rock 'N' Roll (Disc 1) | 1963 |
| | The Birth Of Australian Rock 'N' Roll (Disc 2) | 1963 |
| | The Birth Of Australian Rock 'N' Roll (Disc 3) | 1963 |
| | Real Wild Child | 1978 |
| | The Tarzan Bros. Between Sets 9 | 2004 |
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| Old 97's | Too Far To Care | 1997 |
| | Road 3: The Return Of The Son Of Less Talk, More Monkey | 2001 |
| | Country Comfort (Disc 2) | 2007 |
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| Mike Oldfield | Super Hits Of The '70s: Have A Nice Day, Vol. 23 | 1979 |
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| Olive | Extra Virgin | 1997 |
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| Nigel Olssen | Super Hits Of The '70s: Have A Nice Day, Vol. 22 | 1979 |
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| The Olympics | The Golden Age Of American Rock 'N' Roll, Volume 3 | 1963 |
| | Lookey Dookey / Talking Trash | 1964 |
| | All-Time Greatest Hits! | 1965 |
| | The Mirwood Soul Story | 1968 |
| | The Tarzan Bros. Between Sets 9 | 2004 |
| | Dance Craze ! | 2007 |
| | Under The Covers - NRBQ (Disc 1) | 2007 |
| | Songs We Taught The Detroit Cobras (Disc 1) | 2008 |
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| One Riot One Ranger | The Bottle Let Me Down: Songs For Bumpy Wagon Rides | 2002 |
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| Grady O'Neal and The Bellatones | Radio Cramps: The Purple Knif Show | 1984 |
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| Johnny O'Neal | The Sun Blues Years | 1955 |
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| Richard Oneto - Alfred Drake - Doretta Morrow | "Kismet" Original Broadway Cast Recording | 1953 |
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| The One-Way Streets | Radio Cramps: The Purple Knif Show | 1984 |
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| The Only Ones | DIY: Teenage Kicks - UK Pop I (1976-79) | 1979 |
| | No Thanks! The 70s Punk Rebellion (My Way) (Disc 4) | 2008 |
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| Jackie Opel | Ska Bonanza: The Studio One Ska Years (Disc 2) | 1961 |
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| Operation Ivy | Operation Ivy | 1989 |
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| Orange Juice | The Esteemed Orange Juice: "The Very Best Of" | 1984 |
| | Guestroom & Originals | 2006 |
| | Left Of The Dial (Sort Of) (Disc 2) | 2007 |
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| The Orb | Orblivion | 1997 |
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| Roy Orbison | The Sun Collection (Disc 1) | 1958 |
| | The Sun Collection (Disc 2) | 1958 |
| | Get Hot Or Go Home: Vintage RCA Rockabilly '56-'59 | 1959 |
| | The Golden Age Of American Rock 'N' Roll, Volume 10 | 1963 |
| | For The Lonely: 18 Greatest Hits | 1964 |
| | Rockin' Bones: 1950's Punk & Rockabilly (Disc 2) | 1964 |
| | Born Bad Volume 1 | 1976 |
| | Mystery Girl | 1989 |
| | The Tarzan Bros. Between Sets 10 | 2004 |
| | One In Vermillion: Imaginary Radio - Mix CD #3 | 2006 |
| | Under The Covers - NRBQ (Disc 1) | 2007 |
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| Roy Orbison and The Candy Men | Millenium '60s Rock Party | 1968 |
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| William Orbit | Strange Cargo | 1987 |
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| Orbital | Snivilisation | 1994 |
| | In Sides (Disc 1) | 1996 |
| | In Sides (Disc 2) | 1996 |
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| Orchestra Harlow | The Not-So-White Album | 2008 |
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| Orchestra Of St. Luke's | Music, New York & Hopper | 1930 |
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| Orchestral Manoeuvres In The Dark | Miscellaneous Songs | 1980 |
| | The Best Of OMD | 1986 |
| | Like, Omigod!: The '80s Pop Culture Box (Totally) (Disc 7) | 1989 |
| | Left Of The Dial (Sort Of) (Disc 2) | 2007 |
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| Maren Ord | Christmas Songs | 2000 |
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| The Original Casuals | The Golden Age Of American Rock 'N' Roll, Volume 9 | 1963 |
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| The Orioles | Sing Their Greatest Hits | 1954 |
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| Tony Orlando | The Golden Age Of American Popular Music | 1965 |
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| Orleans | Miscellaneous Songs | 1976 |
| | Super Hits Of The '70s: Have A Nice Day, Vol. 17 | 1979 |
| | Super Hits Of The '70s: Have A Nice Day, Vol. 19 | 1979 |
| | Super Hits Of The '70s: Have A Nice Day, Vol. 25 | 1979 |
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| The Orlons | Cameo Parkway 1957-1967 (Disc 1) | 1967 |
| | Cameo Parkway 1957-1967 (Disc 2) | 1967 |
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| Fernando Ortega | Home | 2000 |
| | Storm | 2002 |
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| Fernando Ortega with Amy Grant | Storm | 2002 |
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| Beth Orton | Central Reservation | 1999 |
| | Road 9: Road To Ruin | 2001 |
| | Daybreaker | 2002 |
| | Pass In Time: The Definitive Collection (Disc 1) | 2003 |
| | Pass In Time: The Definitive Collection (Disc 2) | 2003 |
| | The Other Side Of Daybreak | 2003 |
| | Comfort Of Strangers | 2006 |
| | One In Vermillion: Imaginary Radio - Mix CD #3 | 2006 |
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| Beth Orton with Terry Callier | Pass In Time: The Definitive Collection (Disc 2) | 2003 |
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| Beth Orton with The Chemical Brothers | Pass In Time: The Definitive Collection (Disc 2) | 2003 |
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| Beth Orton with William Orbit | Pass In Time: The Definitive Collection (Disc 2) | 2003 |
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| The Osborne Brothers | Miscellaneous Songs | 1971 |
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| Johnny Osbourne and The Family Group | Reggae Christmas From Studio One | 1973 |
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| Oscar The Grouch | "Sesame Street" Original Cast Recording | 1970 |
| | "Sesame Street" Original Cast Recording | 1970 |
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| Oscar's Chicago Swingers | The Copulatin' Blues Compact Disc: 22 Blues And Jazz Classics | 1939 |
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| Mr. Ose | Mr. Hankey's Christmas Classics | 1999 |
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| Donny Osmond | Believe In Music | 1972 |
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| Buford O'Sullivan | Still Standing: A North American Ska Uprising (Disc 3) | 2003 |
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| Gilbert O'Sullivan | Super Hits Of The '70s: Have A Nice Day, Vol. 11 | 1979 |
| | Super Hits Of The '70s: Have A Nice Day, Vol. 8 | 1979 |
| | Super Hits Of The '70s: Have A Nice Day, Vol. 9 | 1979 |
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| The Other Half | Nuggets: Original Artyfacts From The First Psychedelic Era, Vol. 4 | 1968 |
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| Otis and Carla | Soul Christmas | 1976 |
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| Johnny Otis Quintette (with The Robins and Little Esther) | Blues Masters, Volume 1: Urban Blues | 1966 |
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| Johnny Otis | The Capitol Years | 1959 |
| | Songs For The Luvfest #2 | 2004 |
| | The Tarzan Bros. Between Sets 3 | 2004 |
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| Out Of Line | Still Standing: A North American Ska Uprising (Disc 2) | 2003 |
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| The Outfield | Like, Omigod!: The '80s Pop Culture Box (Totally) (Disc 7) | 1989 |
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| Outkast | Stankonia | 2000 |
| | Speakerboxxx / The Love Below (Disc 1) | 2003 |
| | Speakerboxxx / The Love Below (Disc 2) | 2003 |
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| The Outlaws | Joe Meek - The Alchemist Of Pop: Home Made Hits & Rarities 1959-1966 (Disc 1) | 1966 |
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| The Outlets | DIY: Mass. Ave. - The Boston Scene (1975-83) | 1983 |
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| The Outsiders | Nuggets: Original Artyfacts From The First Psychedelic Era, Vol. 2 | 1968 |
| | The Tarzan Bros. Between Sets 5 | 2004 |
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| Over The Rhine | Patience | 1992 |
| | Good Dog Bad Dog | 1996 |
| | Films For Radio | 2001 |
| | Ohio (Disc 1) | 2003 |
| | Ohio (Disc 2) | 2003 |
| | Drunkard's Prayer | 2005 |
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| Buck Owens | Miscellaneous Songs | 1956 |
| | Christmas With Buck Owens | 1965 |
| | The Very Best Of Buck Owens, Volume 1 | 1971 |
| | Hillbilly Holiday | 1972 |
| | Chicken Fried Country (Disc 2) | 1983 |
| | The Tarzan Bros. Between Sets 3 | 2004 |
| | One In Vermillion: Imaginary Radio - Mix CD #3 | 2006 |
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| Donnie Owens | The Golden Age Of American Rock 'N' Roll, Volume 4 | 1963 |
| | Robert Gordon Is Red Hot! & Originals (Disc 2) | 2007 |
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| Ozark Mountain Daredevils | Super Hits Of The '70s: Have A Nice Day, Vol. 14 | 1979 |
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