Benton County, Washington Zip Codes

Zip Code	City	Population
99336	Kennewick	51,329
99352	Richland	35,618
99337	Kennewick	32,581
99354	Richland	25,676
98944	Sunnyside	25,176
99338	Kennewick	18,312
99353	West Richland	18,264
99350	Prosser	14,287
99320	Benton City	10,023
99346	Plymouth	372
99345	Paterson	164

Population is the most recent figure from the U.S. Census Bureau's 2022 American Community Survey (ACS) 5-Year Estimates.