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- Seamus O'Regan - Host of Canada AM
- Carol Off - Host of As it Happens on CBC Radio
- Craig Oliver - former CTV Ottawa Bureau Chief; now political correspondent and chief parliamentary correspondent
- David Onley - former Citytv Toronto Science and Technology Specialist; CP24 News Anchor; now Lieutenant Governor of Ontario
- Susan Ormiston - CBC
Read more about this topic: List Of Canadian Journalists