- 1 Orangestar
- 2 OCTOBER
- 3 Otokaze
- 4 ONE
- 5 Onoken
- 6 OTHANKQ
- 7 Omoi
- 8 On.U
- 9 Outsider
- 10 otetsu
- 11 OLDE WORLDE
- 12 Olltii
- 13 OneSun
- 14 Okasian
- 15 Optical Eyez XL
- 16 Oki
- 17 Odee
- 18 OJ
- 19 osterreich
- 20 O!Gon
- 21 Ottiki
- 22 Owen Ovadoz
- 23 One Up (원업)
- 24 One Life
- 25 One
- 26 OFA
- 27 Owol
- 28 Ohwon Lee (진짜사나이)
- 29 OVER ARM THROW
- 30 ONGYA