- O.M. SonetaType: GroupActive since: 1973
- Obbie MessakhType: Solo artistActive since: 26 April 1957
- Obbie MessakhCountry: IndonesiaPlace of birth: Rote Ndao
- Octi SevpinType: Solo artistActive since: 7 October 1997
- Oddie AgamType: Solo artistActive since: 19 March 1953
- Oddie AgamCountry: IndonesiaActive since: 1968
- Oele PattiselannoCountry: IndonesiaActive since: 1964
- Oka AntaraCountry: IndonesiaActive since: 2001
- Oline ManuelCountry: IndonesiaBorn: 3 November 2007
- Ona SutraCountry: IndonesiaActive since: 1985
- Once MekelType: Solo artistActive since: 21 May 1970
- OonType: Solo artistActive since: 19 July 1972
- Opet AlatasCountry: IndonesiaActive since: 1997
- Oppie AndarestaType: Solo artistActive since: 20 January 1973
- Oslan HuseinCountry: IndonesiaActive since: 1950
- OtongCountry: IndonesiaPlace of birth: Bandung
- Otong LaloCountry: Indonesia
- Ozzy MiharjaCountry: Indonesia