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Every year, Doors Open Ontario attracts large crowds across Ontario. From April to October, residents and visitors are invited to discover first-hand Ontario’s hidden heritage treasures, some of which have never been open to the public.

• In-person Doors Open Events - in-person events
• Digital Doors Open Events - virtual online events

In-person Doors Open Events (by City)

Belleville Brockton Burlington Carleton Place Cornwall and SDG Counties Guelph Halton Hills Hamilton Kawartha Lakes Kingston and Area Lambton County (more ...)

London Loyalist Township Markham Mississippi Mills Oshawa Ottawa Richmond Hill Simcoe County Toronto Waterloo Region Whitchurch-Stouffville

Digital Doors Open Events (by City)

Amherstburg Aurora Barrie Belleville Brampton Brockville and-area Chatham-Kent Cramahe Township Elora and Fergus Halton Hills Hamilton Hastings County Innisfil Kawartha Lakes Lincoln Mississauga Mississippi Mills Niagara Falls Niagara-on-the-Lake (more ...)

North Bay Northern Bruce Peninsula Oakville Ottawa Oxford-Ingersoll Peterborough Prescott and Russell Quinte West Sault Ste. Marie Simcoe County St. Catharines Stratford Thunder Bay Timmins Toronto Trent Hills Waterloo Region Whitby Windsor