Chester County, Pennsylvania

Chester County
Chester County Courthouse
Flag of Chester County
Official seal of Chester County
Map of Pennsylvania highlighting Chester County
Location within the U.S. state of Pennsylvania
Map of the United States highlighting Pennsylvania
Pennsylvania's location within the U.S.
Coordinates: 39°58′N 75°45′W / 39.97°N 75.75°W / 39.97; -75.75
Country United States
State Pennsylvania
FoundedAugust 24, 1682
Named forChester, England
SeatWest Chester
Largest boroughWest Chester
Government
 • County commission
Area
 • Total759 sq mi (1,970 km2)
 • Land751 sq mi (1,950 km2)
 • Water8.7 sq mi (23 km2)  1.1%
Population
 (2020)
 • Total534,413
 • Density712.0/sq mi (274.9/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional districts5th, 6th
Websitewww.chesco.org
DesignatedOctober 26, 1982[1]

Chester County (Pennsylvania Dutch: Tscheschter Kaundi), colloquially referred to as Chesco, is a county in the Commonwealth of Pennsylvania. It is located in the Delaware Valley region, located in the southeastern part of the state. As of the 2020 census, the population was 545,823(As of 2022),[2] increasing by 7.1% from 498,886 in 2010.[3] The county seat is the Borough of West Chester.[4] The most populous of its 73 municipalities (cities, boroughs, and townships as defined at the state level) is Tredyffrin Township. The most populous boroughs are West Chester and Phoenixville. Coatesville is the only municipality in the County organized under the City form of government, a technical rather than demographic distinction. Chester County was one of the three original Pennsylvania counties created by William Penn in 1682. It was named for Chester, England. The county is part of the Southeast Pennsylvania region of the state.[a]

Chester County is part of the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD Metropolitan Statistical Area. Along with southwest Delaware County, eastern Chester County is home to many communities that comprise part of the Philadelphia Main Line western suburbs of Philadelphia.

As of 2020, the county had the highest median household income level in Pennsylvania, and the 35th-highest in the nation.

  1. ^ "PHMC Historical Markers Search". Pennsylvania Historical and Museum Commission. Commonwealth of Pennsylvania. Archived from the original (Searchable database) on March 21, 2016. Retrieved January 25, 2014.
  2. ^ "2020 Census Demographic Data". US Census Bureau. Archived from the original on August 12, 2021. Retrieved August 20, 2021.
  3. ^ "QuickFacts Chester County, Pennsylvania". United States Census Bureau. Retrieved June 18, 2018.
  4. ^ "Find a County". National Association of Counties. Archived from the original on May 3, 2015. Retrieved June 7, 2011.


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