- O
- OO
- OO
- OOak
- OakObi
- ObiObs
- ObsOce
- OceOct
- OctOdd
- oddOdi
- ODIOf
- OfOff
- OffOgn
- OGROh
- OhOIR
- OirOka
- OkaOl
- OlOld
- OldOle
- OleOli
- OliOll
- OllOM
- omOME
- OmeOmo
- Ond
- OndOne
- Oneone
- OneOnl
- OnlOny
- OnyOpa
- OpaOph
- OpiOr
- OrOrb
- OrbOrc
- OrcOrf
- OrfOri
- OriOrl
- OrlOrp
- OrpOrt
- OrtOsa
- OsaOsc
- OscOsm
- OsnOte
- OteOtt
- OTT
- OOut
- OutOut
- OutOut
- OutOve
- OveOwe
- OweOx
- OX
- OZZ
- Official Hec (New York Rapper)
- Official HIGE DANdism
- Official Secrets Act
- 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. P., Lindo
- Offishall, Kardinal feat. T‐Pain
- OFFL1NX
- Offlaga Disco Pax
- Offline, The
- OFFMi (Russian rapper)
- offonoff (Korean duo)
- Offor, Blessing
- Offseason, The
- Offset (Atlanta rapper, member of Migos)
- Offset & Cardi B
- Offset & JID
- Offset & JID
- Offset & Metro Boomin
- Offset feat. Cardi B
- Offset feat. Don Toliver
- Offset feat. Future
- Offset feat. Scott, Travis
- Offspring (UK punk band)
- Offspring (pop)
- Offspring (70s prog rock)
- Offspring, The (American punk)
- Offspring, The feat. Redman
- OffTopic (Hungarian pop punk)
- Oficina Blues
- Oficina G3 (Braziliam Christian Band)
- Oficio (Post-Punk / Indie Rock artist from Santiago, Chile)
- OFK (We are OFK)
- OfMan, Lewis
- Ofner, Dominik (Austrian Singer, Band, Folk, Pop)
- Ofnus (Atmospheric Black metal band from Wales)
- Oforia
- Ofrin (Israeli singer based in Berlin, Germany and Tel Aviv, Israel)
- oftn
- OG Bobby Billions
- OG BraX (Swiss rapper)
- OG Buda (Russian rapper)
- OG Buda feat. lil krystalll
- OG Florin (Swiss rapper)
- OG Hindu Kush
- OG Ikonen
- OG Keemo (German rapper)
- OG Keemo & Kwam.E
- OG Keemo & Liam, Levin
- OG Keemo & Souly
- Og Kush Salamanda (Lazy Lizzard Gang member)
- OG LOCKE
- OG LU
- OG Maco
- OG Maco & Key
- OG Prince (Russian rapper)
- OG Ron C (Texas-based Swishahouse member & screw DJ Ronald Coleman)
- OG Semi‐Auto (US rapper)
- Óg, Gary
- Ogada, Ayub
- Ogando, Gabriel
- Ogata, Megumi
- Ogawa, Michiko, Trio, The
- Ogawa, Noriko (pianist)
- OGB
- Ogbert the Nerd
- Ogbon, Lord Jah-Monte (US rapper a.k.a. Jah-Monte)
- Ogden Edsl
- Ogden, Craig (guitarist)
- Ogden, Jonathan
- Ogdon, John (pianist and composer)
- Ogeday
- Ogee (Metal guitar player)
- Ogee (French singer‐songwriter)
- Ogemaw County (Detroit, Michigan based metalcore act)
- Ogen
- Ogeret, Marc
- Ogfrankie
- Oghre (Metal band from Rīga, Latvia)
- OGI (Brazilian)
- Ogi (Nigerian‐American singer, songwriter and multi‐instrumentalist)
- Ogi, DJ
- Ogikubo Station
- Ogilvie, George
- Oginome, Yoko (Pop idol, actress & voice actress)
- OGK4Lyf
- Ognevich, Zlata
