Pierce County, Washington

county in the state of Washington, United States

Pierce County is a county in the U.S. state of Washington. As of the 2020 Census, the population was 921,130,[1] making it the second-most populous county in Washington behind King County. The county seat and largest city is Tacoma.[2]

Pierce County
Old City Hall in Tacoma
Old City Hall in Tacoma
Flag of Pierce County
Map of Washington highlighting Pierce County
Location within the U.S. state of Washington
Map of the United States highlighting Washington
Washington's location within the U.S.
Coordinates: 47°03′N 122°07′W / 47.05°N 122.11°W / 47.05; -122.11
Country United States
State Washington
FoundedDecember 22, 1852
Named forFranklin Pierce
Largest cityTacoma
 • Total1,806 sq mi (4,680 km2)
 • Land1,670 sq mi (4,300 km2)
 • Water137 sq mi (350 km2)  7.6%
 • Total921,130
 • Density510/sq mi (200/km2)
Time zoneUTC−8 (Pacific)
 • Summer (DST)UTC−7 (PDT)
Congressional districts6th, 8th, 10th


  1. "QuickFacts: Pierce County, Washington". United States Census Bureau. Retrieved January 20, 2024.
  2. "Find a County". National Association of Counties. Retrieved June 7, 2011.