Cumberland County, Maine

Cumberland County
Cumberland County
County
	The Portland Head Light in Cape Elizabeth
	Seal
	Location within the U.S. state of Maine
	Maine's location within the U.S.
	Coordinates: 43°47′04″N 70°19′41″W / 43.784477°N 70.32798°W
Country	United States
State	Maine
Founded	November 1, 1760
Named for	Prince William, Duke of Cumberland
Seat	Portland
Largest city	Portland
Area
• Total	1,217 sq mi (3,150 km2)
• Land	835 sq mi (2,160 km2)
• Water	383 sq mi (990 km2) 31%
Population (2020)
• Total	303,069
• Estimate (2021)	305,231
• Density	250/sq mi (96/km2)
Time zone	UTC−5 (Eastern)
• Summer (DST)	UTC−4 (EDT)
Congressional district	1st
Website	www.cumberlandcounty.org

Cumberland County is a county in the U.S. state of Maine. As of the 2020 census, the population was 303,069,^[1] making it the most populous county in Maine. Its county seat is Portland.^[2] Cumberland County was founded in 1760 from a portion of York County, Province of Massachusetts Bay, and named for William, Duke of Cumberland, a son of King George II.^[3] Cumberland County has the deepest and second-largest body of water in the state, Sebago Lake, which supplies tap water to most of the county. The county is the state's economic and industrial center, having the resources of the Port of Portland, the Maine Mall, and having corporate headquarters of major companies such as Fairchild Semiconductor, IDEXX Laboratories, Unum, and TD Bank. Cumberland County is part of the Portland–South Portland, ME Metropolitan Statistical Area.

^ "Explore Census Data". data.census.gov. Retrieved November 19, 2021.
^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
^ "Cumberland County, Maine". Archived from the original on April 27, 2012. Retrieved May 5, 2012.