Walla Walla County, Washington

Walla Walla County
Walla Walla County Courthouse in 2024
Location within the U.S. state of Washington
Washington's location within the U.S.
Coordinates: 46°14′N 118°29′W / 46.23°N 118.48°W / 46.23; -118.48
Country United States
State Washington
FoundedApril 25, 1854
Named afterWalla Walla people
SeatWalla Walla
Largest cityWalla Walla
Area
  Total
1,299 sq mi (3,360 km2)
  Land1,270 sq mi (3,300 km2)
  Water29 sq mi (80 km2)  2.2%
Population
 (2020)
  Total
62,584
  Estimate 
(2024)
62,068
  Density46/sq mi (17.8/km2)
Time zoneUTC−8 (Pacific)
  Summer (DST)UTC−7 (PDT)
Congressional district5th
Websiteco.walla-walla.wa.us

Walla Walla County (/ˌwɑːlə ˈwɑːlə/ WAH-lə WAH-lə) is a county located in the southeast of the U.S. state of Washington. As of the 2020 census, its population was 62,584. The county seat and most populous city is Walla Walla. The county was formed on April 25, 1854 and is named after the Walla Walla tribe of Native Americans.

Walla Walla County is included in the Walla Walla, WA Metropolitan Statistical Area. As of 2020, the Walla Walla MSA is the second smallest metropolitan area in the United States, after the Carson City, Nevada MSA.