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- Paul Oakenfold – Creamfields (2004) – 2×CD
- Oasis – Familiar to Millions (2000)
- Mike Oldfield – Incantations (1978) – 2×LP
- Mike Oldfield – Light & Shade (2005)
- The Olivia Tremor Control – Music from the Unrealized Film Script, Dusk at Cubist Castle (1996)
- Oneida – Each One Teach One (2002)
- Yoko Ono – Fly (1971) – 2×LP
- Yoko Ono – Approximately Infinite Universe (1973) – 2×LP
- The Orb – The Orb's Adventures Beyond the Ultraworld (1991) – 2×CD (debut album)
- Ozzy Osbourne – Speak of the Devil (1982)
- Ozzy Osbourne-The Essential Ozzy Osbourne (2003)
- OutKast – Speakerboxxx/The Love Below (2003) – 4×LP, 2×CD
Read more about this topic: List Of Double Albums