10 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 98926 | Ellensburg | 31,883 |
| 98922 | Cle Elum | 7,915 |
| 98925 | Easton | 1,240 |
| 98941 | Roslyn | 884 |
| 98934 | Kittitas | 803 |
| 98943 | South Cle Elum | 707 |
| 98940 | Ronald | 461 |
| 98068 | Snoqualmie Pass | 442 |
| 98946 | Thorp | 303 |
| 98950 | Vantage | 58 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 10 ZCTAs in Kittitas County, Washington (US Census).