Doors Open Ontario

Doors Open Ontario had another successful season! Nearly 500,000 people visited sites in communities across the province. Thanks to our sponsors, partners and volunteers for their support, and to all who participated. Stay tuned for information about next season …

Sir John Johnson Manor House Doors Open Cornwall and SDG Counties

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. During Doors Open, the Glengarry Archives will also be open (call ahead with research requests).

Tell us your story about this site

  • Parking
  • Partial wheelchair access
  • Washrooms
  • National Historic Site (Canada)
  • Kid-friendly
  • Guided tours available

Contact info

19692 William Street
Williamstown, Ontario
Telephone: 613-347-2356
Email: sirjohnjohnsonmanorhouse@bellnet.ca

Architecture

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

Dates/hours open

Saturday August 17 – Sunday August 18, 2019
Saturday and Sunday: 10 a.m. to 4 p.m.

Sir John Johnson Manor House 19692 William Street