What is the legal drinking age in Ontario? July 29, 2020 14:21 Updated The legal drinking age in the Province of Ontario, Canada is 19 years of age. Related articles What is the legal age to Sell, Serve or Handle alcohol in Ontario? I am purchasing or own a licensed establishment, do I need to be Smart Serve Certified? Do part-time and/or unpaid volunteers serving alcohol need to be Smart Serve Certified? Who needs to be Smart Serve Certified? Under the BYOW (Bring Your Own Wine) endorsement, can a customer open their own bottle of wine?