20 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 99163 | Pullman | 33,692 |
| 99111 | Colfax | 4,049 |
| 99161 | Palouse | 1,478 |
| 99170 | Rosalia | 1,015 |
| 99171 | Saint John | 991 |
| 99130 | Garfield | 847 |
| 99033 | Tekoa | 826 |
| 99179 | Uniontown | 647 |
| 99125 | Endicott | 636 |
| 99143 | Lacrosse | 603 |
| 99158 | Oakesdale | 601 |
| 99113 | Colton | 535 |
| 99102 | Albion | 448 |
| 99128 | Farmington | 248 |
| 99017 | Lamont | 208 |
| 99176 | Thornton | 132 |
| 99333 | Hooper | 104 |
| 99149 | Malden | 102 |
| 99174 | Steptoe | 70 |
| 99136 | Hay | 19 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 20 ZCTAs in Whitman County, Washington (US Census).