Ontario County was the name of two historic counties in the Canadian province of Ontario. Both counties were located in approximately the same area and existed on-and-off between 1792 and 1974. Their primary modern successor is the Regional Municipality of Durham, though certain parts of them were transferred to other surrounding regions.

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Country: Canada
Inception: 1792

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Ontario County

former county of Ontario, Canada

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Country: Canada
Inception: 1792

Everything about Ontario County →

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