| Arkady Ostrovsky | Children's songSoviet songPop genre | 8 |
| Michal Kleofas Oginski | Classic | 1 |
| Kristina Orbakaitė | PopSoundtrack | 25 |
| Olga Buzova | PopSoundtrackDance music | 15 |
| Oleg Krikun | Pop | 1 |
| Obe Dve | Independent music | 1 |
| Oleg Smith | Rap | 1 |
| Oleg Miami | PopPop genre | 15 |
| Okean Elzy | Electronic musicRockSoundtrack | 5 |
| Papin Olympos | RockPop RockAlternative rockIndependent musicPop | 6 |
| Turlough O'Carolan | Classic | 6 |
| Jacques Offenbach | Classic | 7 |
