Northumberland County, Ontario

Northumberland County
Northumberland County
County (upper-tier)
	County of Northumberland
	Clockwise from top: Downtown Campbellford from the Trent River, farmland in the Municipality of Trent Hills, downtown Port Hope from the Ganaraska River, downtown Colborne.
	Cobourg Port Hope Hamilton Brighton Alnwick/Haldimand Trent Hills Cramahe
	Location of Northumberland County within Ontario
	Coordinates: 44°07′N 78°02′W / 44.117°N 78.033°W
Country	Canada
Province	Ontario
County seat	Cobourg
Municipalities	List Municipality of Brighton; Town of Cobourg; Municipality of Port Hope; Municipality of Trent Hills; Township of Alnwick/Haldimand; Township of Cramahe; Township of Hamilton;
Government
• Type	Upper-tier municipality (county)
• Warden	Mandy Martin
• Governing body	Northumberland County Council
Area
• Total	1,907.40 km2 (736.45 sq mi)
Population (2021)
• Total	89,365
• Density	46.9/km2 (121/sq mi)
Time zone	UTC−05:00 (EST)
• Summer (DST)	UTC−05:00 (EDT)
Website	www.northumberland.com

Northumberland County is a county situated on the north shore of Lake Ontario, east of Toronto in Central Ontario, Canada. The Northumberland County headquarters are located in Cobourg.