- O.B.S & 4na
- O.D.D. Y.O.U.N.G.I.N.
- Oba Oba Samba House
- Obasi Jackson
- Oceana
- Ocevne
- October London
- Odalo
- Oddliquor
- Oddliquor, Fuego & DVLP
- ODIE
- Odunsi (The Engine)
- Official Watson
- OG KIDDY
- OG Louie the Xiii
- Ogranya
- Ogranya & Efya
- OHJI
- OHTORA
- OHTORA & maeshima soshi
- OJIKAE
- Ojiro
- OKENYO
- Okou
- Ol' Skool
- Ol' Skool, Xscape & Keith Sweat
- Olamide
- Olazermi
- Ole featuring Carl Keaton Jr.
- Oleta Adams
- Olga Sinyaeva & AllSee Band
- Oliver
- Oliver Cronin
- Olivia
- Olivia King
- Olivyah
- Ollane
- Olu Maintain
- Omah Lay
- OMANY
- OMAR
- Omar Apollo
- Omar Coleman
- Omar Kadir
- Omar Sedky
- Omarion
- Omarion & Gucci Mane
- Omarion & Jay Rock
- Omarion & Nadeska Alexis
- ONE
- One Chance
- One Kahleo
- OneWay Monte
- Only Child