Beaver County, Pennsylvania

Beaver County
Beaver County Courthouse
Motto(s): 
Divided by its Rivers, United by its People
Location within the U.S. state of Pennsylvania
Pennsylvania's location within the U.S.
Coordinates: 40°41′N 80°21′W / 40.69°N 80.35°W / 40.69; -80.35
Country United States
State Pennsylvania
FoundedMarch 12, 1800
Named afterBeaver River
SeatBeaver
Largest cityAliquippa
Area
  Total
444 sq mi (1,150 km2)
  Land435 sq mi (1,130 km2)
  Water9.3 sq mi (24 km2)  2.1%
Population
 (2020)
  Total
168,215
  Estimate 
(2023)
165,677
  Density380/sq mi (150/km2)
Time zoneUTC−5 (Eastern)
  Summer (DST)UTC−4 (EDT)
Congressional district17th
Websitewww.beavercountypa.gov
DesignatedJuly 5, 1982

Beaver County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 168,215. Its county seat is Beaver, and its largest city is Aliquippa. The county is part of the Greater Pittsburgh region of the commonwealth.