Kennewick is a city located in Benton County, Washington, in the United States. It is situated along the southwest bank of the Columbia River, positioned just southeast of the confluence of the Columbia and Yakima rivers and across from the confluence of the Columbia and Snake rivers.
The city is the most populous of the three cities collectively known as the Tri-Cities. According to the 2020 census, Kennewick had a population of 83,921, with an estimated population of 86,728 in 2024.