| Locality | Post Code |
|---|---|
| Afton, Delaware | 74331 |
| Bernice, Delaware | 74331 |
| Colcord, Delaware | 74338 |
| Eucha, Delaware | 74342 |
| Grove, Delaware | 74344 |
| Jay, Delaware | 74346 |
| Kansas, Delaware | 74347 |
| Oaks, Delaware | 74359 |
| Rose, Delaware | 74364 |
| Twin Oaks, Delaware | 74368 |
| Watts, Delaware | 74964 |
| West Siloam Springs, Delaware | 74338 |