- Oasis
- Obbie Messakh
- Ocan Siagian
- Oday Akhras
- Ody Malik
- Oka Aza
- Okin
- Ola Cristine
- Ola Viola
- Oliv
- Olivia Norfathir
- Olivia Rodrigo
- Olland Tri
- OM KORA
- Om Putra
- Om Syalala
- OM Wawes
- Om Yosh
- Omega Trio
- Omelette
- Once
- Oncy (Ungu)
- Ondri
- One Avenue Band
- One Direction
- One Feel
- ONE OK ROCK
- OneRepublic
- Onew (SHINee)
- Oney
- Onny Suryono
- Opick
- Opik (Minang)
- Orang Dalam
- Orange Marmalade
- Orange Music
- ORAREWEL
- Orbit
- Organik
- Original Soundtrack Descendants of the Sun
- ORIND
- Orkes Teruna Ria
- Ornito
- Osha
- Oslan Husein
- OST Crayon Shinchan
- OST Mojacko
- OST Uttaran (India)
- Ost. Pocari Sweat
- Our Story
- Our Streets
- Overall
- Ovhi Firsty
- Ovhy Firsty
- Ovy Sovianti
- Ovy Sovianty
- Owl City
- Oxxy
- Oza Kioza
- Ozone
