News Wires, White Papers, and Books
- O'Shea, Michael D. (Michael O'Shea, Mike O'Shea)
- O'Sullivan, Billy 1980– (Billy O', Billy O)
- O'Sullivan, Paul
- O'sullivan, Vincent (Gerard)
- O'Toole, Annette 1952(?)–
- O'Toole, Kate 1961- (Katherine O'Toole)
- O-Town
- Oak Ridge Boys
- Oakland Interfaith Gospel Choir
- Obama, Michelle
- Obey, Ebenezer
- Obomsawin, Alanis 1932–
- Ocampo, Adriana C.: 1955—: Planetary Geologist
- Ocasek, Ric
- Ocean, Billy
- Ocean, Ivory
- Ochman, Joe
- Ochs, Phil
- Ocko, Peter
- Odenkirk, Bob 1962–