Founded in 1871, Whitman County is one of 39 counties in the state of Washington. Historically, Whitman County was formed from Stevens County. The city of Colfax is the county seat. With FIPS code of 75, Whitman County has a population of 47,973 and area of 2,159 square miles (5,592 km2).
List of all cities in Whitman County, WA alphabetically
| City/Town | Postal Code | Area Code |
| Albion, WA | 99102 | 509 |
| Belmont, WA | 99104 | 509 |
| Colfax, WA | 99111 | 509 |
| Colton, WA | 99113 | 509 |
| Diamond, WA | 99111 | 509 |
| Endicott, WA | 99125 | 509 |
| Farmington, WA | 99104 | 509 |
| 99128 | 509 | |
| Garfield, WA | 99130 | 509 |
| Hay, WA | 99136 | 509 |
| Hooper, WA | 99333 | 509 |
| La Crosse, WA | 99143 | 509 |
| 99136 | 509 | |
| Lamont, WA | 99017 | 509 |
| Malden, WA | 99149 | 509 |
| Oakesdale, WA | 99158 | 509 |
| Palouse, WA | 99161 | 509 |
| Plaza, WA | 99170 | 509 |
| Pullman, WA | 99163 | 509 |
| 99164 | 509 | |
| Rosalia, WA | 99170 | 509 |
| Saint John, WA | 99171 | 509 |
| Sprague, WA | 99017 | 509 |
| Steptoe, WA | 99174 | 509 |
| Tekoa, WA | 99033 | 509 |
| Thornton, WA | 99176 | 509 |
| Uniontown, WA | 99179 | 509 |
| Washington State University, WA | 99164 | 509 |