| Locality | Post Code |
|---|---|
| Ashley, Delaware | 43003 |
| Columbus, Delaware | 43240 |
| Delaware, Delaware | 43015 |
| Galena, Delaware | 43021 |
| Harlem Township, Delaware | 43082 |
| Kilbourne, Delaware | 43032 |
| Lewis Center, Delaware | 43035 |
| Ostrander, Delaware | 43061 |
| Powell, Delaware | 43065 |
| Radnor, Delaware | 43066 |
| Shawnee Hills, Delaware | 43065 |
| Sunbury, Delaware | 43074 |
| Westerville, Delaware | 43082 |