|Coordinates: 43°55′N78°56′W / 43.917°N 78.933°W|
|Dissolved||1850 (reorganized into the United Counties of Northumberland and Durham)|
|Time zone||UTC-5 (Eastern (EST))|
|• Summer (DST)||UTC-4 (Eastern (EDT))|
Durham County (area 376,397 acres (1,523 km2)) is an historic county in Ontario, Canada. It was named for the English County Durham and city of Durham. It was created in 1792 but was later merged Northumberland County to form the United Counties of Northumberland and Durham. In 1974, the two counties were split and reorganized, with the former portions of Durham County reorganized into the Regional Municipality of Durham.
Durham County was created in 1792 by a proclamation of Lieutenant Governor Simcoe. The original boundaries were as follows:
In 1798, the Parliament of Upper Canada passed a statute defining the boundaries of the counties. Durham was then defined to include:
In 1834, the townships of Verulam, Fenelon and Eldon were added to Durham County. 
Durham was united administratively with Northumberland County as the United Counties of Northumberland and Durham from 1850 until Durham County was dissolved on January 1, 1974.
Effective January 1, 1974, about half of Durham County was merged with Ontario County to create the Regional Municipality of Durham. The township of Manvers was transferred to Victoria County, which is now the city of Kawartha Lakes, Cavan was transferred to Peterborough County, where it is now part of Cavan-Monaghan, and Hope was transferred to Northumberland County, where it is now part of the town of Port Hope.
The townships of Darlington and Clarke were amalgamated with the Town of Bowmanville and the Village of Newcastle as the Town of Newcastle, and the township of Cartwright was combined with the Ontario County townships of Scugog and Reach to create a new Township of Scugog. In 1993, Newcastle was renamed Clarington.
The county was originally composed of the townships of Cartwright, Manvers, Cavan, Darlington, Clarke and Hope, and portions of what is now Peterborough County, created in 1838. 
Lindsay is a community of 22,367 people on the Scugog River in the Kawartha Lakes region of south-eastern Ontario, Canada. It is approximately 43 km (27 mi) west of Peterborough. It is the seat of the City of Kawartha Lakes, and the hub for business and commerce in the region.
Clarington is a lower-tier municipality in the Regional Municipality of Durham in Ontario, Canada. It was incorporated in 1973 as the town of Newcastle with the merging of the town of Bowmanville, the Village of Newcastle and the townships of Clarke and Darlington, and was established on January 1 1974. In 1993, the town was renamed Clarington, a portmanteau of the names of the two former townships. Darlington today is largely suburban, while Clarke remains largely rural. Bowmanville is the largest community in the municipality and is the home of the municipal offices.
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 Toronto Area and part of the Golden Horseshoe region. It has an area of approximately 2,500 km2 (970 sq mi). The regional government is headquartered in Whitby.
The County of Victoria, or Victoria County, was a county in the Canadian province of Ontario. It was formed in 1854 as The United Counties of Peterborough and Victoria, and separated from Peterborough in 1863. In 2001, the county was dissolved and reformed as the city of Kawartha Lakes. Though first opened to settlement in 1821, the area that was encompassed by Victoria County has a history of Indian occupation, first by the Hurons.
Peterborough County is located in Southern Ontario, Canada. The county seat is Peterborough, which is independent of the county.
Scugog is a township in the Regional Municipality of Durham, south-central Ontario, Canada. It is northeast of Toronto and just north of Oshawa. The anchor and largest population base of the township is Port Perry. The township has a population of roughly 22,500. A smaller Scugog Township was also a historic municipality and geographic township prior to the amalgamation that formed the current municipality.
Haliburton—Kawartha Lakes—Brock is a federal electoral district in central Ontario, Canada, that has been represented in the House of Commons of Canada since 1968.
Bowmanville is a town of approximately 40,000 people located in the Municipality of Clarington, Durham Region, Ontario, Canada. It is approximately 75 km (47 mi) east of Toronto, and 15 km (9.3 mi) east of Oshawa along Highway 2. Bowmanville was first incorporated as a town in 1858, but later incorporated with the neighbouring townships of Clarke and Darlington in 1974 forming the Town of Newcastle, which was renamed in 1994 to the Municipality of Clarington. Bowmanville is part of the Greater Toronto Area.
The United Counties of Northumberland and Durham was a historic county in the Canadian province of Ontario. 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. Manvers Township went to Victoria County and what is now Cavan-Monaghan went to Peterborough County. What is now Port Hope remained in the area which was continued as Northumberland County, while Durham County was dissolved.
Durham is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada from 1904 to 1968 and since 1988.
Durham—Northumberland is a former federal electoral district represented in the House of Commons of Canada from 1979 to 1988. It was located in the province of Ontario. This riding was created in 1976 from parts of Northumberland—Durham and Ontario ridings.
Courtice is a community in Ontario, Canada, about 60 km (37 mi) east of Toronto, within the Municipality of Clarington. Adjacent to Oshawa, it is west of Bowmanville, which is also part of Clarington. Courtice Road connects with Highway 401 at Interchange 425, providing arterial access to the community. Darlington Provincial Park is located just south of Courtice.
Kawartha Pine Ridge District School Board is a public, secular, English language school board headquartered in Peterborough, Ontario. It is the amalgamation of the former Peterborough County Board of Education and the Northumberland-Clarington Board of Education and serves the communities located in the Kawarthas to the north, and south to Lake Ontario. Hastings County is its eastern border and its western border extends to the City of Kawartha Lakes and to the edge of the City of Oshawa.
The Township of Manvers was a municipality in the former Victoria County, now the city of Kawartha Lakes, in the Canadian province of Ontario.
King's Highway 7A, commonly referred to as Highway 7A, is a provincially maintained highway in the Canadian province of Ontario that serves as a bypass of Highway 7. The highway begins in the community of Manchester, where Highway 7 is concurrent with Highway 12, and travels east through Port Perry, Nestleton Station, Bethany and Cavan, ending at Highway 115 southwest of Peterborough. From there, Highway 7 can be reached via Highway 115 northbound. Near its midpoint the route is concurrent with Highway 35 for 1.5 kilometres (0.93 mi).
Ganaraska Region is a region located in Ontario, Canada, stretching along the shore of Lake Ontario for approximately 45 kilometres (28 mi) and about 15 kilometres (9.3 mi) wide. It contains watersheds, covering an area of 700 square kilometres (270 sq mi) from Wilmot Creek in Clarington to eastside of Cobourg and from the southern shore of Rice Lake down to Lake Ontario. This expansive area includes seven municipalities in whole or in part: Township of Cavan Monaghan, Town of Cobourg, Township of Alnwick/Haldimand, Township of Hamilton, Municipality of Port Hope, City of Kawartha Lakes, Municipality of Clarington.
Bowmanville Creek is a stream in the municipality of Clarington, Regional Municipality of Durham in south-central Ontario, Canada. It flows from the Oak Ridges Moraine to Lake Ontario at Bowmanville. The creek is under the auspices of the Central Lake Ontario Conservation Authority.
The Canadian Statesman was a weekly newspaper published in Bowmanville, Ontario, from 1868 to 2008.
Durham was an electoral district of the Legislative Assembly of the Parliament of the Province of Canada, in Canada West, on the north shore of Lake Ontario. It was created in 1841, upon the establishment of the Province of Canada by the union of Upper Canada and Lower Canada. Durham was represented by one member in the Legislative Assembly. It was abolished in 1867, upon the creation of Canada and the province of Ontario.
Garnet Baker Rickard was a Canadian politician who served as the first mayor of the Town of Newcastle from 1974 to 1985. Garnet was well renown for his endeavours in agriculture and would later become a leader in the field, being active in societies and education.
Coordinates: 44°05′N78°36′W / 44.083°N 78.600°W