While this site has participated in Doors Open Ontario in the past, it is not part of the current season’s program. Please check the Home page for this year’s events and participating sites.

Sir John Johnson Manor Housein-person Doors Open Cornwall and SDG Counties

  • In-person
  • Guided tours available
  • Kid-friendly
  • National Historic Site (Canada)
  • Parking
  • Partial wheelchair access
  • Washrooms
Sir John Johnson Manor House

Sir John Johnson (a prominent colonial military leader and administrator) founded Williamstown in 1784 after the American Revolution. He built this house – one of the oldest west of Quebec – as well as a gristmill and sawmill. Johnson helped settle disbanded Loyalist soldiers and their families. Today, it is a local museum and home to the Glengarry Archives.

Contact info

19692 William Street
Williamstown, Ontario
E-mail: sirjohnjohnsonmanorhouse@bellnet.ca


Year built: Begun in 1784
Building type:Historical landmark
Architectural style:Georgian

Dates/hours open

Aug 15, 10:00am - Aug 16, 04:00pm

Saturday and Sunday: 10 a.m. to 4 p.m.