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Ontario GenWeb Project: Ontario County
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Ontario County

In 1792 "The seventh of said counties be hereafter called by the name of the County of Ontario which county is to consist of the following islands, an Island at present known by the name of Isle Tonti to be called Amherst Island an Island known by the name of Isle au Fòret to be called Gage Island an Island known by the name of Isle Cauchois to be called Howe Island and to comprehend all the Islands between the mouth of the Gannoque to the Easternmost extremity of the late township of Marysburg called Point Pleasant."6

Amherst Island "was part of an extensive land grant made in 1675 by Louis XIV of France to explorer Sieur de La Salle, who named it Isle de Tonti after his lieutenant."2

In 1800 "the county of Ontario was abolished in favour of the counties of Frontenac and Addington."6

See Addington County & Frontenac County for further information on this area.

Ontario County was located in South-Eastern Ontario.

  • 1792-1798 - part of Midland District

  • Upper Canada [Est. 1791]
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    Canada West [Est. 1841]
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    Ontario [Est. 1867]
    Addington County [Est. 1792]
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    Algoma District [Est. 1858]
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    Bathurst District [Est. 1824]
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    Bothwell District [Est. 1867]
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    Brant County [Est. 1852]
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    Brock District [Est. 1837]
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    Bruce County [Est. 1849]
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    Cardwell District [Est. 1867]
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    Carleton County [Est. 1800]
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    Cochrane District [Est. 1922]
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    Colborne District [Est. 1841]
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    Dalhousie District [Est. 1838]
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    District of Keewatin [Est. 1876]
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    Dufferin County [Est. 1881]
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    Dundas County [Est. 1792]
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    Durham County [Est. 1792]
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    Eastern District [Est. 1792]
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    Elgin County [Est. 1852]
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    Essex County [Est. 1792]
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    Frontenac County [Est. 1792]
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    Glengarry County [Est. 1792]
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    Gore District [Est. 1816]
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    Grenville County [Est. 1792]
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    Grey County [Est. 1852]
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    Haldimand County [Est. 1800]
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    Haliburton County [Est. 1874]
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    Halton County [Est. 1816]
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    Hastings County [Est. 1792]
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    Hesse District [Est. 1788]
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    Home District [Est. 1792]
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    Huron County [Est. 1842]
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    Huron District [Est. 1842]
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    Johnstown District [Est. 1798]
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    Kenora District [Est. 1907]
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    Kent County [Est. 1792]
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    Lambton County [Est. 1850]
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    Lanark County [Est. 1824]
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    Leeds County [Est. 1792]
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    Lennox & Addington County [Est. 1800]
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    Lennox County [Est. 1792]
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    Lincoln County [Est. 1792]
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    London District [Est. 1800]
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    Lunenburg District [Est. 1788]
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    Manitoulin District [Est. 1888]
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    Mecklenburgh District [Est. 1788]
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    Middlesex County [Est. 1800]
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    Midland District [Est. 1792]
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    Monck County [Est. 1867]
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    Muskoka District [Est. 1868]
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    Nassau District [Est. 1788]
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    Newcastle District [Est. 1802]
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    Niagara District [Est. 1800]
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    Nipissing District [Est. 1858]
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    Norfolk County [Est. 1792]
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    Northumberland County [Est. 1792]
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    Ontario County [Est. 1849]
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    Ontario County (#1) [Est. 1792]
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    Ottawa District [Est. 1816]
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    Oxford County [Est. 1800]
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    Parry Sound District [Est. 1869]
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    Peel County [Est. 1852]
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    Perth County [Est. 1850]
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    Peterborough County [Est. 1838]
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    Prescott County [Est. 1800]
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    Prince Edward County [Est. 1792]
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    Prince Edward District [Est. 1831]
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    Rainy River District [Est. 1885]
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    Renfrew County [Est. 1838]
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    Rupert's Land
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    Russell County [Est. 1800]
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    Simcoe County [Est. 1798]
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    Simcoe District [Est. 1837]
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    Stormont County [Est. 1792]
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    Sudbury District [Est. 1894]
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    Suffolk County [Est. 1792]
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    Talbot District [Est. 1837]
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    Thunder Bay District [Est. 1871]
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    Timiskaming District [Est. 1912]
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    Victoria County [Est. 1852]
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    Victoria District [Est. 1837]
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    Waterloo County [Est. 1838]
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    Welland County [Est. 1845]
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    Wellington County [Est. 1852]
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    Wellington District [Est. 1837]
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    Wentworth County [Est. 1816]
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    Western District [Est. 1792]
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    York County [Est. 1792]

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