| 99102 Albion | 509 | Whitman County | Washington (WA) |
| 99104 Belmont | 509 | Whitman County | Washington (WA) |
| 99111 Colfax | 509 | Whitman County | Washington (WA) |
| 99113 Colton | 509 | Whitman County | Washington (WA) |
| 99111 Diamond | 509 | Whitman County | Washington (WA) |
| 99125 Endicott | 509 | Whitman County | Washington (WA) |
| 99104 Farmington | 509 | Whitman County | Washington (WA) |
| 99128 Farmington | 509 | Whitman County | Washington (WA) |
| 99130 Garfield | 509 | Whitman County | Washington (WA) |
| 99136 Hay | 509 | Whitman County | Washington (WA) |
| 99333 Hooper | 509 | Whitman County | Washington (WA) |
| 99143 La Crosse | 509 | Whitman County | Washington (WA) |
| 99136 Lacrosse | 509 | Whitman County | Washington (WA) |
| 99143 Lacrosse | 509 | Whitman County | Washington (WA) |
| 99017 Lamont | 509 | Whitman County | Washington (WA) |
| 99149 Malden | 509 | Whitman County | Washington (WA) |
| 99158 Oakesdale | 509 | Whitman County | Washington (WA) |
| 99161 Palouse | 509 | Whitman County | Washington (WA) |
| 99170 Plaza | 509 | Whitman County | Washington (WA) |
| 99163 Pullman | 509 | Whitman County | Washington (WA) |
| 99164 Pullman | 509 | Whitman County | Washington (WA) |
| 99170 Rosalia | 509 | Whitman County | Washington (WA) |
| 99171 Saint John | 509 | Whitman County | Washington (WA) |
| 99017 Sprague | 509 | Whitman County | Washington (WA) |
| 99174 Steptoe | 509 | Whitman County | Washington (WA) |
| 99033 Tekoa | 509 | Whitman County | Washington (WA) |
| 99176 Thornton | 509 | Whitman County | Washington (WA) |
| 99179 Uniontown | 509 | Whitman County | Washington (WA) |
| 99164 Washington State University | 509 | Whitman County | Washington (WA) |