| Locality | Post Code |
|---|---|
| Alpental, Kittitas | 98068 |
| Cle Elum, Kittitas | 98922 |
| Doris, Kittitas | 98950 |
| Easton, Kittitas | 98925 |
| Ellensburg, Kittitas | 98926 |
| Hyak, Kittitas | 98068 |
| Kittitas, Kittitas | 98934 |
| Liberty, Kittitas | 98922 |
| Rocklyn, Kittitas | 98941 |
| Ronald, Kittitas | 98940 |
| Roslyn, Kittitas | 98941 |
| Snoqualmie Pass, Kittitas | 98068 |
| South Cle Elum, Kittitas | 98943 |
| Suncadia, Kittitas | 98922 |
| Teanaway, Kittitas | 98922 |
| Thorp, Kittitas | 98946 |
| Thrali, Kittitas | 98926 |
| Vantage, Kittitas | 98950 |