- O
- OO
- OO
- OO
- OOak
- Oak
- ObeOBO
- OboOca
- OcbOc
- OceOct
- OctOdd
- OddOde
- ODEOdo
- OdoOf
- OfOff
- OffOfn
- OfrO
- OGXOha
- OhaOil
- OilOK
- OKOki
- OKIOla
- OlaOld
- OldOle
- OlOli
- OliOli
- OliOlo
- OloOm
- OmOMB
- OmbOmm
- OmmOn
- OnOnd
- OnDOne
- OneOne
- Oneone
- OneOnl
- OnlOnu
- OnuOon
- OonOpe
- OpeOPM
- OPMOr
- OROra
- OraOrc
- OrcOrd
- OrdOrg
- OrgOri
- Oriori
- OriOrm
- OrmOrp
- OrpOrr
- Orrort
- OrtOsb
- OsbOsc
- OscOsm
- Osmost
- OstOth
- OthOtt
- Ott
- Our
- OurOut
- OutOut
- OutOv
- OvOve
- OveOvi
- OviOwe
- OweOxi
- OxiOzb
- OzbOzu
- Ozuozz
- Ohana Bam
- Ohara, Raz and Odd Orchestra, The
- Ōhara, Sakurako
- Ohara, Yuiko
- Ohashi, Ayaka
- Ohashi, Chippoke
- Ohashi, Junko
- ohashiTrio
- Ohasis (Oasis Tribute band from Nottingham)
- Ohbijou
- Ohead (UK psy‐trance producer Dave Hendry)
- Ohen (slovakian black metal)
- Ohene
- OHEY
- OhGeesy
- OhGeesy & Kalan.FrFr
- OhGeesy feat. BIA
- OhGeesy Feat. Boogie Wit da Hoodie, A
- OhGeesy feat. Cash Kidd
- OhGeesy Feat. Central Cee
- OhGeesy Feat. DaBaby
- OhGeesy feat. Kalan.FrFr
- OhGeesy feat. Tyga
- ohGr (electro-industrial band)
- Ohguro, Maki
- Ohio Express
- Ohio Players
- 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)
- Ohlenbusch, Henning (singer/songwriter)
- Ohlin, Ari
- Ohm (fusion band of ex-Megadeth guitarist Chris Poland)
- Ohm Guru
- Ohm-I (Leron Gray)
- Ohm-N-I
- Ohmama, Takashi
- Ohmio
- Ohmna
- Ohmura, Takayoshi
- OHMYMEITING & Lee, Marcus
- OHMYMEITING & MFMF.
- OHN
- OHNA (Newcastle, Australia)
- OHNO (LA latino rapper)
- Ohno, Aika
- Ohno, Eri
- Ohno, Katsuo
- Ohno, Yuji (anime music composer and jazz pianist)
- Ohno, Yuji & Lupintic Five
- Ohno, Yuji, Trio
- OHO (Trip-Hop/Folk/Electronica)
- OHora, Zephaniah
- OhPonyBoy
- OHR (Seattle based psych solo project of Craig Klein.)
- Ohrage
- Ohrbooten
- Ohrenfeindt
- ohsxnta
- Ohta, Mitsuhiro
- Ohtaki, Eiichi
- Ohtani, Tomoya, Eguchi, Takahito feat. Barnitt, Quinn
- Ohtar (Polish black metal)
- Ohtis
- Ohuchi, Yoshiaki
- 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
- Oídos Fresh, Los
- Oigăn (Eugen Nuțescu)
- Óige
- Õigemeel, Birgit
- Oihenart, Maddi (Basque singer)
- OIJ (Dutch musician Valentijn Crouwel)
- Oikawa, Mitsuhiro
- Oiki (dubstep artist)
- Oil (Bolivian Rock Band)
- Oil (Hard Rock band from Lahr in Germany)
- Oil 10
