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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
.