The United Counties of Northumberland and Durham was a
historic county in the
Canadian province
Within the geographical areas of Canada, the ten provinces and three territories are sub-national administrative divisions under the jurisdiction of the Canadian Constitution. In the 1867 Canadian Confederation, three provinces of British Nor ...
of
Ontario
Ontario ( ; ) is one of the thirteen provinces and territories of Canada.Ontario is located in the geographic eastern half of Canada, but it has historically and politically been considered to be part of Central Canada. Located in Central Ca ...
. The two counties were originally combined in the
District of Newcastle formed in 1802, and continued as united counties from 1850 until January 1, 1974 when portions of
Durham County were amalgamated with adjacent
Ontario County to form the
Regional Municipality of Durham
The Regional Municipality of Durham (), informally referred to as Durham Region, is a regional municipality in Southern Ontario, Canada. Located east of Toronto and the Regional Municipality of York, Durham forms the east-end of the Greater T ...
.
Manvers Township
The Township of Manvers (area ) was a municipality in the former Victoria County, now the city of Kawartha Lakes, in the Canadian province of Ontario.
History
From 1792 to 1974 Manvers Township was located in Durham County, which was united ...
went to
Victoria County and what is now
Cavan-Monaghan
Cavan Monaghan (known as Cavan-Millbrook-North Monaghan until 2007) is a township in Peterborough County in central-eastern Ontario, Canada, southwest of the city of Peterborough.
History
The original townships of Cavan and Monaghan were surve ...
went to
Peterborough County. What is now
Port Hope remained in the area which was continued as
Northumberland County, while Durham County was dissolved.
Former counties in Ontario
Populated places disestablished in 1974
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