- O
- OO
- OO
- OO
- OO
- OOak
- OakObe
- ObeOBL
- OblObs
- Obsoce
- OceOce
- oceOct
- OctOda
- OdbOdd
- OddOde
- OdeODU
- ODUOf
- OfOff
- OFFOfi
- Ofiogo
- OGROh
- OhOhi
- OhiOIL
- OilOk
- OkOke
- OkeOl
- OlOla
- OlaOld
- OldOl
- OlOlg
- OlgOli
- OliOli
- OliOls
- OlsOMA
- OmaOma
- OmaOme
- OmeOmn
- OmnOn
- OnOne
- ONEOne
- OneOne
- OneOne
- OneONJ
- OnkOnn
- ONOOny
- OnyOos
- OosOpe
- OpOpi
- OpiOpu
- OpuOra
- Oraorb
- OrbOrc
- OrcOrc
- OrcOre
- OreOrh
- OrhOri
- ORIOrk
- OrkOrn
- OrnOrq
- OrqOrr
- OrrOrt
- OrtOsa
- OsaOsc
- OscOsk
- OskOss
- OssOT
- OtaOth
- OthOtt
- OttOtt
- OttOur
- OurOut
- OutOut
- OutOut
- OutOv
- OvOve
- OveOve
- OveOwe
- OweOwl
- OwlOxl
- Oxl
- OzaOzo
- OzoOzz
- Ohio State University Marching Band
- Ohio University Marching 110
- Ohioan
- Ohishi, Rumi
- Ohja, Udhav, Shetty, Manohar, Ishaan, Pandit, Shweta, Bhatawdekar, Sonali & Mazumdar, Preetha
- OHKABE (Canadian Artist)
- Ohkawa, Mizuki (riparia records)
- OHKAYA
- Ohlenbusch, Henning (singer/songwriter)
- Ohlin, Ari
- Ohlman, Christine & Montez, Rebel
- Ohm Guru
- Ohm-G
- Ohm-I (Leron Gray)
- Ohm-N-I
- Ohmama, Takashi
- Öhman Organ Grinders (Kjell Öhman; Ulf Andersson; Claes Janson; Thomas Arensen; Tommy Johnson & Douglas Westlund)
- Öhman, Kjell (Swedish jazz musician)
- Ohmie feat. BVLVNCE
- Ohmio
- Ohmna
- Ohmori, Motoki (Motoki Ohmori)
- Ohmori, Yohei
- OHMS (heavy/stoner rock band from Argentina)
- Ohms, The
- Ohmura, Takayoshi
- OHMYMEITING & Lee, Marcus
- OHMYMEITING & MFMF.
- OHN
- OHNA (Newcastle, Australia)
- OHNO (LA latino rapper)
- Ohno, Aika
- Ohno, Eri
- Ohno, Katsuo
- Ohno, Katsuo & Ohno, Katsuo
- Ohno, Yuji (anime music composer and jazz pianist)
- Ohno, Yuji & Lupintic Five
- Ohno, Yuji & Lupintic Five with Friends
- Ohno, Yuji & You & The Explosion Band
- Ohno, Yuji feat. Keida, Akemi
- Ohno, Yuji feat. Kurahashi, Ruiko
- Ohno, Yuji, Trio
- OhNos, The
- OHO (Trip-Hop/Folk/Electronica)
- OHO
- Oho, The (Finnish band)
- OHora, Zephaniah
- OHR (Seattle based psych solo project of Craig Klein.)
- Ohrage
- Ohrbooten
- Ohrenfeindt
- Ohrenpeyn
- Ohrima
- Ohta, Mitsuhiro
- Ohta, Takako
- Ohtaki, Eiichi
- Ohtani, Tomoya, Eguchi, Takahito feat. Barnitt, Quinn
- Ohthatsmizz
- Ohtis
- ohyeahsumi
- OHYUNG
- OHYUNG & STEFA*
- Oi Polloi
- Oi Va Voi (British band)
- Oi Va Voi feat. Zinger, Earl
- Oi-Melz
- Oi-Skall Mates
- Oi! Scouts, The (Oi band from USA)
- Oi! Se Arma (Islas Canarias)
- Oi! The Arrase
- Oi!takus
- OID (Indie Vocaloid Musician)
- Oidorno
- Oídos Fresh, Los
- Oif Simchas
- Oigăn (Eugen Nuțescu)
- Õigemeel, Birgit
- OIIO (Dutch indie folk band)
- OIJ (Dutch musician Valentijn Crouwel)
- Oikawa, Mitsuhiro
- Oiki (dubstep artist)
- Oïkoumen (French symphonic metal band)
- Oil (Bolivian Rock Band)
- Oil (Hard Rock band from Lahr in Germany)
- Oil Barons, The
- Oil Boom
- Oil Giant
- Oil on Canvas (Daggers, Hoffmann)
- Oil Tasters
- OILA
