Walla Walla County ( ) 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 third smallest metropolitan area in the United States, after the Carson City, Nevada MSA and Eagle Pass, Texas MSA.
Geography
According to the United States Census Bureau, the county has a total area of , of which (2.2%) are covered by water.
Geographic features
- Columbia River
- Snake River
- Blue Mountains
- Touchet River
- Ponderosa Pines
- Banana Belt
- Walla Walla River
Major highways
- 20px U.S. Route 12
- 20px U.S. Route 730
Adjacent counties
- Columbia County - east
- Umatilla County, Oregon - south
- Benton County - west
- Franklin County - northwest
National protected areas
- McNary National Wildlife Refuge
- Umatilla National Forest (part)
- Whitman Mission National Historic Site