Kennewick is a city in Benton County in the U.S. state of Washington. It is located along the southwest bank of the Columbia River, just southeast of the confluence of the Columbia and Yakima rivers and across from the confluence of the Columbia and Snake rivers. It is the most populous of the three cities collectively referred to as the Tri-Cities. The United States Census Bureau estimated the population to be 84,750 as of 2022, up from 83,921 at the 2020 United States Census. The discovery of Kennewick Man along the banks of the Columbia River provides evidence of Native Americans' settlement of the area for at least 9,000 years. American settlers began moving into the region in the late 19th century as transportation infrastructure was built to connect Kennewick to other settlements along the Columbia River. The construction of the Hanford Site at Richland accelerated the city's growth in the 1940s as workers from around the country came to participate in the Manhattan Project.

Country: United States
State: Washington
County: Benton
Type: Council–manager
Mayor: Bill McKay
City manager: Erin Erdman
Population (2020): 83,921
Estimate (2022): 84,750
Rank: US: 411th, WA: 14th
Urban: 255,401 (US: 158th)
Metro: 310,000 (US: 166th)
CSA: 366,206 (US: 103rd)
Columbia River Valley: 310,000
Time zone: Pacific (PST) (UTC−8)
Summer (DST): PDT (UTC−7)
ZIP Codes: 99336–99338
Area code(s): 509
FIPS code: 53-35275
GNIS feature ID: 1512347
Website: go2kennewick.com
Wikidata description: city in Benton County, Washington, USA
Wikidata id: Q844033
Wikidata label: Kennewick
Wikidata aliases: Array
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