| Orchestre National, Paris | 2 | 1962 |
| Orchestre Peter Hamilton And Dorsey Dodd | 1 | 1971 |
| Orchestre Philarmonique Néerlandais | 1 | 1955 |
| Orchestre Philharmonique De Berlin | 1 | 1962 |
| Orchestre Philharmonique De Berlin, Herbert Von Karajan | 1 | |
| Orchestre Philharmonique De Berlin, Lorin Maazel | 1 | 1962 |
| Orchestre Philharmonique De New York Dir. Bruno Walter | 1 | 1957 |
| Orchestre Philharmonique De Strasbourg | 1 | 1974 |
| Orchestre Philharmonique De Vienne Dir. Pierre Monteux | 2 | 1962 |
| Orchestre Polydor, Les Compagnons De La Chanson | 1 | 1962 |
| Orchestre Radio-Symphonique De Berlin, Dir: Ferenc Fricsay | 1 | |
| Orchestre Ramuntcho De St-Jean-Pied-De-Port | 7 | 1957 - 1970 |
| Orchestre Ray Martin | 1 | 1967 |
| Orchestre Rouge | 1 | 1982 |
| Orchestre Samy Cates | 1 | |
| Orchestre Septentrional | 1 | 1968 |
| Orchestre Sinfonietta Vox Vienne, Dir. Hans Hagen | 1 | 1955 |
| Orchestre Sous La Direction De Frankie Carmelo | 1 | |
| Orchestre Sous La Direction De Frederick Fennell | 1 | 1968 |
| Orchestre Symphonique De Chicago | 1 | 1965 |
| Orchestre Symphonique De Detroit, Paul Paray | 2 | |
| Orchestre Symphonique de l'Académie d'Etat d'URSS, Evgueni Svetlanov | 1 | |
| Orchestre Symphonique De La N.D.R., Hambourg | 1 | |
| Orchestre Symphonique De Minneapolis, Antal Dorati | 1 | 1960 |
| Orchestre Symphonique De Québec | 1 | 1982 |
| Orchestre Symphonique De Vienne, Wolfgang Sawallisch | 1 | |
| Orchestre Symphonique, André Kostelanetz | 1 | 1951 |
| Orchestre Symphonique Du Gurzenich De Cologne | 1 | 1981 |
| Orchestre Symphonique Eastman-Rochester | 1 | 1964 |
| Orchestre Symphonique Sous La Direction De Harry Rabinowitz | 1 | 1980 |
| Orchestre Zacharias | 1 | 1969 |
| Orchestrele „Ciocîrlia” Și Radioteleviziunea, Victor Predescu | 1 | |
| Orchid | 1 | 2013 |
| The Orchids [UK Indie] | 1 | 1989 |
| The Orchids [USA 80s] | 1 | 1980 |
| Orchstre Des Ballets Loïe Fuller Dir. H. Rawson | 1 | 1963 |
| The Order Of The 12 | 1 | 2022 |
| Oregon | 16 | 1972 - 1980 |
| Oregon And Elvin Jones | 3 | 1976 |
| Oreste (Tenor) And Jean Fenn (Soprano) And Henri René And His Orchestra And Chorus | 1 | |
| Orexis | 1 | 1978 |
| ORF Symphony Orchestra And Chorus, Lamberto Gardelli | 1 | 1981 |
| Organ And Chimes | 4 | |
| The Organ Grinders | 1 | 1970 |
| The Organ Masters | 3 | 1967 - 1969 |
| Organic Thoughts | 1 | 2004 |
| Organisation | 3 | 1970 - 2020 |
| Orgone Box | 2 | 2016 - 2020 |
| Orhan Demir | 1 | 1990 |
| Orhiko Khantariak | 1 | 1967 |
| Oriel Clair | 1 | 1968 |
| The Orient Express | 2 | 1969 |
| Oriental Sunshine | 1 | 2000 |
| Oriental Wind | 2 | 1981 - 1983 |
| Oriental Wind / Karnataka College Of Percussion | 1 | 1985 |
| Orietta Berti | 17 | 1965 - 2021 |
| Orietta Berti E Claudio Lippi Con I Piccoli Cantori Di Niny Comolli | 1 | 1979 |
| Os Originais Do Samba | 2 | 1972 |
| The Original Animals | 7 | 1977 |
| Original Artists | 1 | 1980 |
| Original Australian Cast | 1 | 1980 |
| Original Black Bottom Skiffle Group | 1 | 1972 |
| The Original Blind Boys Of Alabama | 2 | 1962 - 1963 |
| The Original Blue Velvet | 1 | |
| The Original Blues Project | 3 | 1973 - 1991 |
| The Original Bogtrotters | 1 | |
| Die Original Böhmische Musikanten | 1 | 1969 |
| Original Bregenzerwälder Dorfmusikanten | 1 | 1990 |
| Original Broadway Cast | 86 | 1949 - 1986 |
| Original Broadway Cast - Dreamgirls | 1 | 1982 |
| Original Broadway Cast - It's A Bird It's A Plane It's Superman | 1 | 1966 |
| Original Broadway Cast - Leader Of The Pack | 4 | 1985 |
| Original Broadway Cast - The Boys In The Band | 1 | 1969 |
| The Original Broadway Cast (Hair) | 1 | 1968 |
| The Original Broadway Cast | 4 | 1959 - 1964 |
| Original Camellia Jazz Band | 1 | 1988 |
| Original Cast | 54 | 1949 - 1987 |
| Original Cast (Let My People Come) | 1 | 1974 |
| Original Cast (Lonesome Stone) | 1 | 1973 |
| Original Cast 1946 Broadway Revival | 1 | 1949 |
| Original Cast Of Star Wars With Narration By Roscoe Lee Browne | 7 | 1977 - 1983 |
| Original Cast Of Star Wars With Naration By Roscoe Lee Browne | 1 | |
| Original Cast Recording | 10 | 1959 - 2017 |
| Original Cast Recording With Barbara Dickson | 2 | 1974 |
| Original Cast Soundtrack | 1 | 1967 |
| Original Cast, Malachi Throne | 1 | 1980 |
| The Original Cast | 1 | 1984 |
| The Original Caste | 2 | 1969 |
| Original Concept | 1 | 1988 |
| The Original Crane River Jazz Band | 4 | 1957 - 1963 |
| The Original Dave Brubeck Quartet | 1 | |
| The Original Dixie Stompers | 1 | 1981 |
| The Original Dixieland Jass Band | 1 | |
| Original Dixieland Jazz Band | 3 | 1955 - 1983 |
| The Original Dixieland Jazz Band | 10 | 1955 - 1983 |
| The Original Drifting Cowboys | 1 | 1969 |
| Die Original Egerländer Musikanten | 1 | |
| Original Eghalanda Blasmusik / Hans Und Wenzel | 1 | 1969 |
| Original Fidelen Rosentalern | 1 | 1973 |
| Original Film Score | 1 | 1958 |
| Original Five Blind Boys | 1 | 1960 |
| The Original Five Blind Boys (Jackson Harmoneers) | 5 | 1960 - 1981 |
| The Original Five Blind Boys Of Alabama | 2 | 1964 - 1970 |
| The Original Five Blind Boys Of Mississippi | 2 | 1961 |
| Original Gospel Harmonettes | 1 | 1959 |
| The Original Hilo Hawaiians | 1 | 1969 |
| Die Original Hoch- Und Deutschmeister | 2 | |
| Die Original Hoch- Und Deutschmeisterkapelle | 1 | 1967 |
| The Original Iron Maiden | 1 | 2012 |
| The Original Johnny Otis Show | 4 | 1978 - 1985 |
| The Original Joplin Forte | 1 | 1968 |
| Original Knickerbocker | 1 | 1982 |
| Original London Cast | 15 | 1955 - 1987 |
| Original London Cast (Principal Members) | 1 | 1981 |
| The Original London Cast Of 'Hello, Dolly!' | 1 | |
| Original London Cast Recording | 2 | 1967 - 1993 |
| The Original Lonesome Pine Fiddlers | 1 | 1983 |
| Original Memphis 5 | 1 | 1971 |
| Original Memphis Five | 2 | 1969 - 1972 |
| Original Milser Buam Mit Den Loinger Diandln | 2 | |
| Original Mirrors | 6 | 1980 - 1981 |
| The Original Modern Lovers | 2 | 1981 |
| Original Motion Picture Cast - Little Shop Of Horrors | 1 | 1986 |
| Original Motion Picture Score | 1 | 1968 |
| Original Naabtal Duo | 2 | 1988 - 1989 |
| The Original National Theatre Cast | 1 | 1982 |
| Original New York Cast | 2 | 1950 - 2016 |
| The Original New York Cast, Featuring Dylan Thomas | 2 | |
| Original Oberkrainer Avsenik | 2 | |
| The Original Pistols | 1 | 1985 |
| Die Original Puszta Zigeuner | 1 | |
| The Original Rabbits | 1 | 1986 |
| Original Radio Broadcast | 3 | 1973 |
| Original Sin | 1 | 1986 |
| The Original Singing Sons Of Washington D. C. | 1 | 1984 |
| Original Soho Skiffle Group | 1 | 1960 |
| The Original Soul Stirrers With J.J. Farley | 1 | 1983 |
| Original Sound Track Recording | 1 | 1969 |
| Original Soundtrack | 162 | 1954 - 2017 |
| The Original Surfaris | 1 | 1963 |
| The Original Texas Playboys | 4 | 1977 - 1985 |
| Original Trientiner Bergsteigerchor S.O.S.A.T. | 1 | |
| The Original Trinidad Steel Band | 6 | 1957 - 1966 |
| Original Trinidad Tropicana Steel-Band | 2 | |
| The Original Tuxedo 'Jass' Band | 1 | |
| Original TV Cast | 3 | 1958 - 1976 |
| Original TV Cast (Lorne Greene, Michael Landon, Dan Blocker, Pernell Roberts) | 2 | 1962 - 1963 |
| Original TV Soundtrack | 3 | 1962 - 1966 |
| Die Original-Böhmerwald-Musikanten, Das Gesangsduo Horak Und Alo Schnurrer | 1 | 1968 |
| Original-Russisches Balalaika-Ensemble "Wolga" | 1 | |
| The Originals [South Africa] | 1 | 1990 |
| The Originals | 11 | 1969 - 1978 |
| Originalton | 1 | 1982 |
| The Orioles / The Cadillacs | 1 | 1960 |
| The Orioles Featuring Sonny Til | 2 | 1962 - 1963 |
| The Orioles | 13 | 1960 - 1983 |
| Orion | 8 | 1979 - 1987 |
| Orion The Hunter | 2 | 1984 |
| Örjans | 1 | 1974 |
| Orkest o.l.v. Vladimir Cosma | 1 | 1977 |
| Orkest Van De Weense Volksopera | 1 | |
| Orkestar Bečke Državne Opere I Volksopere And Hans Hagen | 1 | 1966 |
| Orkestar Čalgija RT Skopje | 2 | 1976 - 1982 |
| Orkestar Feata Sejdića | 4 | 1976 - 1988 |
| Orkestar Gaudeamus, Zlatan Srzić | 1 | 1983 |
| Orkestar Gaudeamus, Zlatan Srzić, Radovan Vlatković | 1 | 1982 |
| Orkestar Ilije Genić And Orkestar Vojislava Simića | 1 | 1958 |
| Orkestar Jovice Ajdarevića | 1 | 1982 |
| Orkestar KUD "Tamburica" Staro Petrovo Selo | 4 | 1976 - 1986 |
| Orkestar Milana Nikolića Donje | 1 | 1977 |
| Orkestar Miodraga Todorovića Krnjevca | 1 | 1984 |
| Orkestar Muzičke Omladine | 1 | 1986 |
| Orkestar Rimske Opere, Jonel Perlea, Jussi Björling, Leonard Warren, Zinka Milanov | 1 | 1965 |
| Orkestar Žarka Petrovića | 2 | 1974 - 1978 |
| Orkestar Zlatka Černulja I Beti Jurković | 1 | 1961 |
| Orkestar Zorana Vlajića | 1 | 1987 |
| Orkestar Đele Jusića | 3 | 1977 - 1988 |
| Orkester Opere SNG Maribor | 1 | 1979 |
| Orkester Slovenske Filharmonije | 4 | 1966 - 1982 |
| Orkester Slovenske Filharmonije, Pavel Kogan | 1 | 1987 |
| Orkiestra Reprezentacyjna Wojska Polskiego (The Polish Army Orchestra) | 1 | 1966 |
| The Orkney Strathspey And Reel Society | 1 | 1976 |
| Orlando [Cathy Lucas] | 1 | 2016 |
| Orleans | 24 | 1973 - 1986 |
| Orlík | 1 | 1990 |
| Orlons | 1 | 1963 |
| The Orlons | 10 | 1962 - 1977 |
| The Ormonde Folk | 1 | 1971 |
| Ornella Vanoni | 14 | 1972 - 1982 |
| Ornette Coleman | 30 | 1960 - 2016 |
| Ornette Coleman And Prime Time | 1 | 1988 |
| The Ornette Coleman Double Quartet | 2 | 1961 |
| The Ornette Coleman Quartet | 2 | 1962 |
| The Ornette Coleman Trio | 3 | 1977 |
| Ornette Coleman, Charlie Haden | 1 | 1979 |
| Ornette Coleman, The London Symphony Orchestra, David Measham | 1 | 1972 |
| Oroboros | 1 | 1985 |
| Orphan [Canada] | 2 | 1983 - 1985 |
| Orphan | 4 | 1972 - 1974 |
| Orphan Egg | 2 | 1968 |