Artists/Bands whose names begin with the "O"
- Oliver Who?
- Olivia
- Olivia Newton-John
- Olivia Ruiz
- Oliviya
- Ollie And Jerry
- Ollie James
- Olly B
- Olly Murs
- Olmyta
- Olu Dara
- Olvav Basoski
- Olympus Mons
- Omar
- Omar And The Howlers
- Omar Cruz
- Omar Garcia
- Omar LinX
- Omar Pedrini
- Omar Simon
- Omarion
- Omawi Bling
- Omc
- Omega
- Omega Bugembe Okello
- Omer Inayat
- Omg
- Omg Girlz
- Omnium Gatherum
- On And On
- On The Line All Stars
- On Top
- Ondina
- Ondrej Havelka And The Swings
- One-2
- One 2 Many
- One 2 One
- One Block Radius
- One Chance
- One Direction
- One Dove
- One Eskimo
- One Family
- One Man Army And The Undead Quartet
- One Minute Silence
- One More Angel
- One More Time
- One Night Only
- One Step Program
- One-T
- Of Montreal
- Ofasia
- Ofelia
- Off-Shore
- Office
- Officer
- Officer Kicks
- Official
- Official Hot Mess
- Offspring
- Ofra Haza
- Ogc
- Oh!
- Oh, Atoms
- Oh Land
- Oh No Not Stereo
- Oh Snap!
- Oh Well
- Ohi Ho Bang Bang
- Ohio Express
- Ohio Players
- Oingo Boingo
- Oj Da Juiceman
- OJ Hanssen
- Ojos De Brujo
- Ok Go
- Okkervil River
- Ol' Dirty Bastard
- Ol' Skool
- Ol Skool Nu Skool
- Ola
- Olav Basoski
- Old Crow Medicine Show
- Old Money
- Old Skull
- Ole
- Oleander
- Oleta Adams
- Olga Stankevich
- Olga Tanon
- Oli.P
- Olinda
- Olive
- Oliver
- Oliver Cheatham
- Oliver De Ville
- Oliver Heldens
- Oliver Koletzki
- Oliver Onions
- Oliver S
- O'2L
- O.A.R.
- O'Bryan
- O.C.U.
- O'Chi Brown
- O Children
- O.G. Black
- O'Jays
- O.K.
- O'Kanes
- O.L.G.B.
- O.M.D.
- O Rap
- O Rappa
- O'Ryan
- O'so Krispie
- O-Town
- O-Zone
- Oak Ridge Boys
- Oaktown's 3-5-7
- Oasis
- Obed
- Obernik
- Obie Bermudez
- Obie-P
- Obie Trice
- Obita
- Obk
- Obscenity Trial
- Obscure
- Oby
- Ocean
- Ocean Blue
- Ocean Colour Scene
- Ocean Drive
- Oceana
- Oceanic
- Oceanlab
- Octave One
- October
- October Project
- Octobre Rouge
- Octopus
- Odalys
- Odds
- Odissi
- Odyssey
- Odyssey Into The Mind's Eye
- Of Lmfao
- Of Monsters And Men