Franklin County, Washington

Franklin County
Franklin County Courthouse in Pasco
Location within the U.S. state of Washington
Washington's location within the U.S.
Coordinates: 46°32′N 118°54′W / 46.54°N 118.9°W / 46.54; -118.9
Country United States
State Washington
FoundedNovember 28, 1883
Named afterBenjamin Franklin
SeatPasco
Largest cityPasco
Area
  Total
1,265 sq mi (3,280 km2)
  Land1,242 sq mi (3,220 km2)
  Water23 sq mi (60 km2)  1.8%
Population
 (2020)
  Total
96,749
  Estimate 
(2024)
101,238
  Density76/sq mi (30/km2)
Time zoneUTC−8 (Pacific)
  Summer (DST)UTC−7 (PDT)
Congressional districts4th, 5th
Websitewww.co.franklin.wa.us

Franklin County is a county located in the U.S. state of Washington. As of the 2020 census, its population was 96,749. The county seat and most populous city is Pasco. The county was formed out of Whitman County on November 28, 1883, and is named for Benjamin Franklin.

Franklin County is included in the Tri-Cities metropolitan area. Together, Kennewick, Richland and Pasco comprise Washington's Tri-Cities.