An Act to incorporate The Ontario Historical Society, Assented to 1st April, 1899, at The Legislative Assembly of Ontario, authorizes The Ontario Historical Society (OHS) to incorporate not-for-profit historical corporations as independent legal entities in the Province of Ontario.

The Society's membership includes over 350 of these incorporated heritage organizations.

Since March 2007, the OHS has incorporated the following 64 historical organizations across Ontario: 

AFFILIATED SOCIETIES DATE OF INCORPORATION
   
Trafalgar Township Historical Society March 2007
Essex & Community Historical Research Society March 2007
Ontario Heritage Fairs Association March 2007
Green Bay Heritage Cemetary Association March 2007
SilverShoe Historical Society September 2007
Anderson Farm Museum & Heritage Society September 2007
Societe Historique de Nouvel-Ontario September 2007
   
Thornhill Heritage Foundation April 2008
Weston Heritage Conservation District June 2008
Wollaston Heritage September 2008
Bruce Mines and District Historical Society November 2008
Credit Valley Heritage Society November 2008
Dunnville Culture & Heritage Foundation November 2008
   
The Portland on the Rideau Historical Society January 2009
The Canadian Royal Heritage Trust March 2009
The Unionville Villagers' Association March 2009
The Adolphustown-Fredericksburgh Heritage Society June 2009
Canadian Friends Historical Association September 2009
Chiefswood Board of Trustees September 2009
Kawartha Heritage September 2009
London and Western Ontario Branch of the UEL September 2009
The Jack Munroe Historical Society of Elk City November 2009
   
Les amis du Musee du Moulin a fleur February 2010
Powassan & Area Historical Society February 2010
Glengarry Fencibles Trust April 2010
Soo Pipe Band June 2010
National Historic Sites Alliance for Ontario September 2010
Halisburton County Historical Society September 2010
Friends of Twelve Mile Lake Church September 2010
North Halton Celtic Historical Society September 2010
Friends of Ermatinger Clergue National Historic Site November 2010
Irondale Historical Society November 2010
Howe Island Historical Society November 2010
   
Early Canada Association February 2011
Norfolk Arts Culture and Heritage Alliance February 2011
Friends of Lincoln's History February 2011
Algoma 1812 February 2011
Friends of Freeman Station February 2011
Ramara Historical Society June 2011
   
Sumac-Simcoe County's Cultural Network June 2011
Dalkeith Historical Society June 2011
New Credit Cultural Heritage Society June 2011
Kennebec and District Historical Society October 2011
The Montgomery's Inn Museum INNovators October 2011
The Society for the Preservation of the Samuel Bechtel Burial Ground October 2011
Archives Lanark December 2011
Kanyen'keha Revitalization Society December 2011
   
Friends of the Marrickville Turbine March 2012
Canadian Chapter of the Society for the Preservation of Old Mills March 2012
Society for the Preservation of Paris Architectural Heritage June 2012
New Sudbury Historical Society/Historique du Nouveau Sudbury June 2012
Friends of Auchmar October 2012
Morgan Horse Heritage Centre October 2012
John McNeely McCrea Pioneer Model and Educational Fund October 2012
Paris Plains Cemetery Association October 2012
Huntsville and Area Historical Society October 2012
Wiikwe-aapkaak Gabizhiwebak Society October 2012
Kensington Market Historical Society November 2012
Southern Ontario Military Muster November 2012
   
Haliburton Highlands Quilt Guild February 2013
Silver Mountain and Area Historical Society February 2013
Glengarry Pioneer Museum May 2013
Penetanguishene Historical Society May 2013
Friends of the Educational Archives Serving Brant, Haldimand, and Norfolk Counties May 2013
The Friends of the Beaverdams Church October 2013
The Community Waterfront Heritage Centre October 2013
Toronto Branch The Monarchist League of Canada October 2013
Friends of the South Grey Museum October 2013
Les Amis Duff-Bâby October 2013
Plympton-Wyoming Historical Society October 2013
The 100th Regiment Historical Society November 2013
   
Essex Armoured Soldiers Museum February 2014
Sharon Burying Ground Association February 2014
Canadian Lighthouses of Lake Superior February 2014
Friends of Moreston Village at Grey Roots
June 2014
Nine Mile Point Lighthouse Preservation Society June 2014
Renfrew County Museums Network June 2014
Historical Society of South Dundas June 2014
West Nipissing Historical Society

June 2014

   

Leslieville Historical Society

January 2015
The Harmony Collaboration March 2015
Nottawasaga Lighthouse Preservation Society March 2015 
McNab & District Celtic Heritage Society August 2015 
Centre Lochiel Centre August 2015 
Thunder Bay Railway Historical Society October 2015  
Buddies of the Brill October 2015 
Middlesex Centre Archives December 2015
Heritage Port Stanley December 2015 
   
The Friends of Wesleyville Village, Ontario March 2016
Elgin Historical Society April 2016
Friends of Historic Bovaird House May 2016
Lakehead Transportation Museum Society June 2016
Green Machinery History and Heritage June 2016 
Friends of Grain Elevators

June 2016 

Halton Black History Awareness Society

July 2016

   
St. Mark’s Coptic Museum February 2017
Deseronto & District Historical Society February 2017

HISTORIC JOHN MCKENZIE HOUSE

34 Parkview Avenue
Willowdale, Ontario, M2N 3Y2

P. 416-226-9011 | F. 416-226-2740

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