Benton County
Also known as Benton County, Washington, Benton County, WA
county in the state of Washington, United States
Key facts
- Country
- United States
- State
- Washington
- Founded
- March 8, 1905
- Named after
- Thomas Hart Benton
- Seat
- Prosser
- Largest city
- Kennewick
- Total
- 1,760 sq mi (4,600 km )
- Land
- 1,700 sq mi (4,400 km )
- Water
- 60 sq mi (160 km ) 3.4%
- Estimate 2025
- 221,722
- Density
- 110/sq mi (42/km )
- Time zone
- UTC−8 ( Pacific )
- Summer dst
- UTC−7 ( PDT )
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Article
Benton County, Washington
Benton County is a county in the south-central portion of the U.S. state of Washington. As of the 2020 census, its population was 206,873. The county seat is Prosser, and its most populous city is Kennewick. The Columbia River demarcates the county's north, south, and east boundaries.