- O
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- ObObl
- OblOC
- OCOce
- OCEOct
- OctOcu
- OcuOdd
- OddOdi
- OdiODZ
- OeOff
- OffOff
- Offogo
- ogoOh
- OhOHN
- OhnOje
- OjeOKA
- OKAOku
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- ozz
- Off Broadway (American rock band)
- Off by One
- Off Course (Japanese folk band)
- Off Grid (Prog rock/metal group from Israel)
- Off Guard
- OFF KEY JUNIOR & Lovespeake
- Off Limits (Celtic/Gothic rock band from Germany)
- Off Minor
- Off Our Rocker (Baltimore, MD area trio)
- Off Road Minivan
- Off the Beat (University of Pennsylvania Co-ed a Cappella Group)
- Off The Coast
- Off the Meds (house producers)
- off the menu (South Korean band)
- Off the Record (Christian rock band)
- Off the Shelf
- Off Thoughts (artist from Germany)
- Off Topic (Canadian hip hop)
- Off With Their Heads
- Off-Leash (Akron, OH Pop-punk/Easycore (formerly Detention))
- Off, Fake (hardcore punk)
- OFF! (US hardcore punk band)
- Offa Rex (Olivia Chaney and The Decemberists)
- OFFAIAH
- Offbeat (UK rapper)
- OFFBEAT COWBOY
- Offcutts
- Offenbach (Quebec group)
- Offenbach, Jacques (German-French composer, cellist and impresario)
- Offended (UK metal/rock band)
- Offenders, The (Italian ska band)
- Offendum, Omar
- Offer (Lil Data + Harry Burgess of Adult Jazz)
- Offer Nissim feat. Maya (Israeli house duo)
- Offering, The (Christian folk)
- Offering, The (US melodic death/groove metal, deathcore/nu-metal band)
- Offerman, Catie
- Offerman, Jim
- Offerman, Nick
- Offertorium
- Offghost
- Offghost & Jerome Broxton
- Offghost & Simisola Adeyemi
- Offghost & Sword, Sonny
- Offghost & Wesley Sneed
- Offghost, Noah Hickin & Aiden Karastanovic
- OffGrid (Swedish electronic)
- Office (Chicago indie rock band)
- Office Culture
- Office Hours
- Officer Down
- Officer Down (American beatdown/hardcore band)
- Officer May
- Officer Negative
- Officer X
- Officer, Jordan
- Officer, The (Freestyle)
- Official (Australian born contemporary R&B artist)
- Official Hec (New York Rapper)
- Official HIGE DANdism
- Official Secrets Act
- Official Sidekick Productions (Theatre Troupe)
- Official, MARCY (Cantora PALOP)
- Officiel (French-Moroccan rapper)
- Officina della Camomilla, L’
- Officina della Camomilla, L’ feat. Stato Sociale, Lo
- Officina meccanica
- Officina Zoè
- Officium Triste (Dutch death/doom metal band)
- Offishall, Kardinal feat. T‐Pain
- OFFL1NX
- Offlaga Disco Pax
- Offline, The
- OFFMi (Russian rapper)
- Offo tokyo
- offonoff (Korean duo)
- Offor, Blessing
- Offs, The (70s USA punk band from California)
- Offseason, The
- Offset (Atlanta rapper, member of Migos)
- Offset & Cardi B
- Offset & Gunna
- Offset & JID
- Offset & JID
- Offset & Key Glock
- Offset & Legend, John
- Offset & Metro Boomin
- Offset & Teezo Touchdown
- Offset & Ty Dolla Sign
- Offset & YoungBoy Never Broke Again
