| ZIP Code | ZIP Code Place Name | County | ZIP Code Type |
|---|---|---|---|
| 98930 | Grandview | Yakima County | Standard |
| 98944 | Sunnyside | Yakima County | Standard |
| 99301 | Pasco | Franklin County | Standard |
| 99302 | Pasco | Franklin County | PO Box |
| 99320 | Benton City | Benton County | Standard |
| 99326 | Connell | Franklin County | Standard |
| 99330 | Eltopia | Franklin County | Standard |
| 99335 | Kahlotus | Franklin County | PO Box |
| 99336 | Kennewick | Benton County | Standard |
| 99337 | Kennewick | Benton County | Standard |
| 99338 | Kennewick | Benton County | Standard |
| 99343 | Mesa | Franklin County | Standard |
| 99344 | Othello | Adams County | Standard |
| 99345 | Paterson | Benton County | PO Box |
| 99346 | Plymouth | Benton County | PO Box |
| 99349 | Mattawa | Grant County | Standard |
| 99350 | Prosser | Benton County | Standard |
| 99352 | Richland | Benton County | Standard |
| 99353 | West Richland | Benton County | Standard |
| 99354 | Richland | Benton County | Standard |