West Richland is a city in Benton County, Washington. The population was 16,295 at the time of the 2020 census. The city is part of the Tri-Cities metropolitan area, whose principal cities are Richland, Kennewick, and Pasco.

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.