- Orphan Black
- Orphelins de Duplessis
- Orpheum Theatre
- Orpheum Theatre
- Orpheus Choir of Toronto
- Orpheus Club
- Orpheus Club of Halifax
- Orpheus Musical Theatre Society of Ottawa
- Orr, Hugh
- ORTECH International
- Orton, George
- Les soldats canadiens et la bataille d'Ortona
- Orval Prophet
- Orville Fisher (Obituary)
- Orville J.w. Shugg