| Of Mice & Men |
| Of Monsters And Men |
| Of Montreal |
| Of No Avail |
| Of the Son |
| Of verona |
| Ofenbach |
| Ofer Assaf |
| OFF |
| Off & Gone |
| Off Broadway |
| Off By One |
| Off Glass |
| Off Our Rocker |
| Off the International Radar |
| Off the Record |
| Off-Hand |
| Offaiah |
| Offbeats |
| Offenbach |
| Offer Nissim |
| Offering |
| Offhanded |
| Office |
| Officer Negative |
| Official Family |
| Offlaga Disco Pax |
| Offset |
| Offset |
| Offside |
| Offspring |
| Offstage Chorus |
| Oficina G3 |
| Ofra Harnoy |
| Ofra Haza |
| OG 3Three |
| OG Boo Dirty |
| OG Boobie Black |
| OG Fuse |
| OG Keemo |
| Og L'enf |
| Og L'enf |
| OG Maco |
| OG Playboy |
| OG Ron C |
| OG Ron C's Wreckin Yard |
| OG Tipecial |
| og3ne |
| OGB |
| Ogden's, Bob Orchestra |
| Ogeng Wang Ayo |
| Ogilvie, Phil Rhythm Kings |
| Ogri ai |
| Ogris Debris |
| Oh Honey |
| Oh land |
| Oh Laura |
| Oh My God |
| Oh No |
| Oh No & Medaphoar |
| Oh oh cherso |
| Oh Oh Oranje |
| Oh Sees |
| Oh Susanna |
| Oh Susannah |
| Oh Wonder |
| OH! TIGER MOUNTAIN |
| Oh, Hush! |
| Ohashi Takuya |
| OhGr |
| Ohio Express |
| Ohio Players |
| Ohio State University Marching Band |
| Ohio University Leading Tones |
| Ohm Guru |
| Ohm-G |
| Ohmega Watts |
| OHN |
| Ohrbooten |
| Ohta-San |
