| Artist Name | Title | Media Type | Label | Catalog Number | Year | Qty | Condition |
| Tim O'Brien | Fiddler's Green | CD | Sugar Hill Records | 2005 | 1 | ||
| Tim O'Brien | Traveler | CD | Sugar Hill Records | 2003 | 1 | ||
| Mark O'Connor | The New Nashville Cats | CD | Warner Bros. Records Inc. | 1991 | 1 | ||
| The O'Jays | Comin' Through | LP Vinyl | Imperial Records | LP-9290 | 1 | ||
| Gilbert O'Sullivan | Back To Front | LP Vinyl | M.A.M. Records Ltd | MAM-5 | 1972 | 1 | |
| Gilbert O'Sullivan | I'm A Writer, Not A Fighter | LP Vinyl | M.A.M. Records Ltd | MAM 7 | 1973 | 1 | |
| The Oak Ridge Boys | Deliver | LP Vinyl | MCA Records Inc. | MCA-5455 | 1983 | 1 | |
| Ocean | [45] Put Your Hand In The Hand | 45 RPM | Kama Sutra | KA 519 | 1 | promo | |
| Old 97's | Too Far To Care | CD | Elektra/Asylum | 1997 | 1 | ||
| Orbc Music | Ascribe - EP | CD | Orbc Music | 2017 | 1 | ||
| Roy Orbison | [45] Breakin' Up Is Breakin' My Heart | 45 RPM | M-G-M Records | K13446 | 1 | promo | |
| Roy Orbison | Mystery Girl | Cassette | Virgin Records America | 7 91058-4 | 1989 | 1 | |
| Roy Orbison | Roy Orbison's Greatest Hits | LP Vinyl | Monument Record Corp. | M 4009 | 1 | ||
| Roy Orbison | Signature Series - The All-Time Greatest Hits Of Roy Orbison | LP Vinyl | Monument Record Corp. | KWG38384 | 1972 | 1 | |
| Tony Orlando & Dawn | Greatest Hits | LP Vinyl | Arista Records | ABM 4045 | 1975 | 1 | |
| Orleans | Forever | LP Vinyl | Infinity Records | INF 9006 | 1979 | 1 | |
| Eugene Ormandy and the Minneapolis Symphony Orchestra | Die Fledermaus - Overture | 16 2/3 RPM | RCA Red Seal | M 262 | 1 | ||
| Donny Osmond | My Best To You | LP Vinyl | MGM Records | SE-4872 | 1972 | 1 | |
| Marie Osmond | Paper Roses | LP Vinyl | MGM Records | SE-4910 | 1973 | 1 | |
| Marie Osmond | There's No Stopping Your Heart | LP Vinyl | Capitol Records, Inc./Curb Records | ST-12414 | 1985 | 1 | |
| Paul Overstreet | Heroes | CD | RCA Records | 1991 | 1 | ||
| Paul Overstreet | Love Is Strong | CD | RCA Records | 1992 | 1 | ||
| Buck Owens | The Buck Owens Collection (1959-1990) [Box Disc 1] | CD | 1992 | 1 | |||
| Buck Owens | The Buck Owens Collection (1959-1990) [Box Disc 2] | CD | 1993 | 1 | |||
| Buck Owens | The Buck Owens Collection (1959-1990) [Box Disc 3] | CD | Rhino Records, Inc. | 1992 | 1 | ||
| OXO | [45] Whirly Girl | 45 RPM | Geffen Records | 7-29765 | 1983 | 1 |