Benton County, Washington ZIP Codes
- ZIP records
11 - Cities represented
8 - Sum of listed ZIP population estimates
234,788
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 99336 | Kennewick | 50,735 |
| 2 | 99352 | Richland | 37,430 |
| 3 | 99337 | Kennewick | 33,287 |
| 4 | 99354 | Richland | 25,559 |
| 5 | 98944 | Sunnyside | 22,817 |
| 6 | 99338 | Kennewick | 20,633 |
| 7 | 99353 | West Richland | 19,251 |
| 8 | 99350 | Prosser | 14,837 |
| 9 | 99320 | Benton City | 9,879 |
| 10 | 99346 | Plymouth | 198 |
Cities in Benton County
ZIP Directory
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Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.