- O
- OO
- OO
- OO
- OOak
- OakOb
- ObObl
- OblOby
- OBZOce
- OceOct
- OctOct
- OCUOdd
- OddOdi
- OdiOdy
- OdyOfe
- OfeOff
- OffOGI
- OgiOh
- OhOhm
- OhmOiz
- OJOKA
- OkaOkt
- OktOLA
- OlaOld
- OldOle
- OleOli
- OliOli
- OliOlr
- Olrom
- OmOMB
- OmbOmi
- OmiOn
- OnOnd
- One
- OneOne
- OneOne
- OneOnl
- OnlOnr
- ONROom
- OomOpe
- OpeOpi
- OpiOQu
- OquOra
- OraOrb
- OrbOrc
- OrcOre
- OreOrg
- OrgOri
- OriOrl
- OrlOro
- OroOrq
- OrqOrt
- OrtOs
- OsOsb
- OsbOsi
- Osiosq
- OSR
- Otk
- OtlOtt
- OttOug
- OuiOus
- OusOut
- OutOut
- OutOv
- OvOve
- Oveovl
- OVNOwe
- OweOxi
- Oxi
- OzbOzu
- Ozuozz
- Odyssey (early 70s Motown soul act, key track “Battened Ships”)
- Odyssey (Dan Swanö side project, Swedish progressive metal band)
- Odyssey (instrumental metal trio from Spokane, WA)
- Odyssey (originally US family act Lopez Sisters, now UK fronted by Steven Collazo)
- Odyssey (Polish ambient/electronic producer Tomasz Pauszek)
- Odyssey (Spanish progressive metal band)
- Odyssice (Dutch melodic/prog rock group)
- ODZ (Swedish hip hop)
- ODZ ft Azide
- Oe, Senri
- Oedipe Nautique (French alt./prog group)
- Oedipus (L.A. based power trio)
- Oedipus Apartment Complex
- Oeffling, Tommy
- Oehl
- Oeley
- Oerding, Johannes
- Oerding, Johannes & Connor, Sarah
- Oerding, Johannes & Müller, Ina
- Oerding, Johannes & Sebastian Krenz
- Oertli, Danny
- Oesch, Melanie & Fischer, Helene
- Oesch’s die Dritten
- OesteSanto
- Oete
- of all living things
- Of All Things
- Of All We Cherish
- Of Allies
- Of Blackest Oceans (New Zealand metalcore)
- Of Blessings and Burdens (Amherst, MA post-hardcore band)
- Of Colours (Modern Metal band from Frankfurt/Main, Germany)
- Of Deities and Dust (Doom metal from Dallas, TX)
- Of Eyes That See
- Of Eyes That See feat. Piper, Joel
- Of Gentlemen & Cowards
- Of Good Nature
- Of Gray
- Of Ice (American thrash metal band)
- Of Limbo
- Of Machines
- Of Mice & Men
- Of Modern Architecture
- Of Monsters and Men
- of Montreal
- of Montreal feat. Monáe, Janelle
- of Montreal feat. Solange
- Of New Trolls (New Trolls splinter group; formerly UT New Trolls)
- Of Night And Light (Artist)
- Of Norway & Dale, Linnea
- of persephone (siren-rock band)
- Of Roofs, Genes and Stolen Meanings
- Of Spire & Throne
- Of the Land
- Of the Son
- Of the Trees
- Of the Trees, Crenshaw, Barclay & Strategy
- Of the Vine (US post-rock)
- Of the Wand & the Moon
- Of the Wand & the Moon feat. Howden, Matt
- Of Truth
- Of Us Giants
- of Verona (LA indie rock/electropop group)
- Of Virtue
- Of Virtue feat. Wolfe, Kalie
- Of Vizions
- Of Water
- Of Wolves
- Ofarim, Esther
- Ofarim, Gil
- OFB
- Ofb1t
- Ofdrykkja
- Ofege
- Ofei, Ryan (Ghanaian-Canadian singer)
- Ofelia (Iga Krefft)
- Ofelia K
- Ofeliadorme
- Ofenbach (French DJ duo)
- Ofenbach & FAST BOY
- Ofenbach & Gray, Sam
- Ofenbach & Henderson, Ella
- Ofenbach & ilese, salem
- Ofenbach & Jesso, Justin
- Ofenbach & Martine, Norma Jean
- Ofenbach & Portugal. The Man
- Ofenbach & Quarterhead
- Ofenbach & Quarterhead feat. Martine, Norma Jean
- Ofenbach & Rehab
- Ofenbach & SVEA
