- O
- OO
- OO
- OOak
- OakObi
- ObiObs
- ObsOce
- OceOct
- OctOdd
- OddOde
- OdeOef
- OehOff
- OffOgd
- OgdOh
- OhOi
- OiOk
- okOku
- OkuOld
- OldOld
- OldOli
- OliOli
- OliOls
- OlsOMB
- OMBOmn
- OmnO
- OnaOne
- OneOne
- OneOng
- OngOno
- OnoOom
- OomOpe
- OpeOpt
- optOra
- OraOrc
- OrcOrd
- OrdOrh
- OrhOri
- OriOrm
- OrmOrq
- OrqOrt
- OrtOsb
- OsbOsi
- OsiOst
- OstOth
- OthOtt
- OttOur
- OurOut
- OutOut
- OutOve
- OveOve
- OveOwe
- OweOxl
- OxlOzm
- OZMOZZ
- Oh Susanna
- Oh The Blood
- Oh The Horror
- oh the joy. (new age/meditation music)
- Oh The Larceny
- Oh Well
- Oh Wonder
- Oh, Flamingo! (Filipino indie rock band)
- Oh, Ha-young
- Oh, Hush!
- Oh, Juliet!
- Oh, Kevin
- Oh, Libia!
- Oh, Manhattan
- Oh, Nadia
- Oh, Ny
- Oh, Rose
- Oh, Sleeper
- Oh, The Story!
- Oh, Weatherly (TX Pop Punk Band)
- Oh! (of Tromsø, Norway)
- Oh! Ayatollah
- Oh! Penelope
- Oh! Tiger Mountain
- Oh! You Pretty Things (Charlotte band)
- Oh!, The
- Oh. (aka Olivia Hadjiioannou)
- Oh'laville
- Ohad
- Ohal (Ohal Grietzer)
- 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
- OHEY
- OhGeesy
- 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
- 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
- Ohmna
- Ohmura, Takayoshi
- OHN
- OHNA (Newcastle, Australia)
- Ohno, Aika
- Ohno, Eri
- Ohno, Yuji (anime music composer and jazz pianist)
- Ohno, Yuji & Lupintic Five
- Ohno, Yuji, Trio
- OHO (Trip-Hop/Folk/Electronica)
- OhPonyBoy
- OHR (Seattle based psych solo project of Craig Klein.)
- Ohrage
- Ohrbooten
- Ohrenfeindt
- ohsxnta
- Ohtaki, Eiichi
- Ohtani, Tomoya, Eguchi, Takahito feat. Barnitt, Quinn
- Ohtis
- OHYUNG
- Oi Polloi
- Oi Va Voi (British band)
- Oi Va Voi feat. Zinger, Earl
- Oi-Melz
- Oi-Skall Mates
