| Locality | Post Code |
|---|---|
| Franklin Depot, Delaware | 13839 |
| Fraser, Delaware | 13753 |
| French Woods, Delaware | 13783 |
| Grand Gorge, Delaware | 12434 |
| Gregorytown, Delaware | 13755 |
| Halcott, Delaware | 12430 |
| Halcottsville, Delaware | 12438 |
| Hales Eddy, Delaware | 13783 |
| Hamden, Delaware | 13782 |
| Hancock, Delaware | 13783 |
| Harpersfield, Delaware | 13786 |
| Harvard, Delaware | 13756 |
| Hawleys, Delaware | 13856 |
| Hobart, Delaware | 13788 |
| Hubbell Cors, Delaware | 12474 |
| Ivanhoe, Delaware | 13839 |
| Kelsey, Delaware | 13783 |
| Kortright, Delaware | 13739 |
| Lake Delaware, Delaware | 13753 |
| Leonta, Delaware | 13775 |
| Lordville, Delaware | 13783 |
| Margaretville, Delaware | 12455 |
| Masonville, Delaware | 13804 |
| Meredith, Delaware | 13753 |
| Meridale, Delaware | 13806 |
| Merrickville, Delaware | 13839 |