Berks County, Pennsylvania

Berks County
Reading, the largest city in the county and fourth-largest in Pennsylvania, in October 2010
Location within the U.S. state of Pennsylvania
Pennsylvania's location within the U.S.
Coordinates: 40°25′N 75°56′W / 40.42°N 75.93°W / 40.42; -75.93
Country United States
State Pennsylvania
FoundedMarch 11, 1752
Named afterBerkshire, England
SeatReading
Largest cityReading
Area
  Total
866 sq mi (2,240 km2)
  Land857 sq mi (2,220 km2)
  Water9.2 sq mi (24 km2)  1.1%
Population
 (2020)
  Total
428,849
  Density495/sq mi (191/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional districts4th, 6th, 9th
Websitewww.berkspa.gov
DesignatedMay 12, 1982

Berks County (Pennsylvania Dutch: Barricks Kaundi) is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the county's population was 428,849. The county seat is Reading, the fourth-most populous city in the state. The county is part of the South Central region of the commonwealth.

The county borders Lehigh County to its north, Schuylkill County to its north, Lebanon and Lancaster counties to its west, Chester County to its south, and Montgomery County to its east. The county is approximately 26 miles (42 km) southwest of Allentown, the state's third-largest city, and 50 miles (80 km) northwest of Philadelphia, the state's largest city.

The Schuylkill River, a 135-mile-long (217 km) tributary of the Delaware River, flows through Berks County. The county is part of the Reading, PA metropolitan statistical area (MSA), which in turn is part of the Greater Philadelphia metropolitan area known as the Philadelphia-Reading-Camden, PA-NJ-DE-MD combined statistical area (CSA).