| Locality | Post Code |
|---|---|
| Big Springs, Keith | 69122 |
| Brule, Keith | 69127 |
| Bucktail, Keith | 69155 |
| Keystone, Keith | 69144 |
| Lemoyne, Keith | 69146 |
| Lewellen, Keith | 69147 |
| Ogallala, Keith | 69153 |
| Paxton, Keith | 69155 |
| Roscoe, Keith | 69153 |
| Sarben, Keith | 69155 |
| Thune, Keith | 69155 |