| Locality | Post Code |
|---|---|
| Brucetown, Frederick | 22622 |
| Clear Brook, Frederick | 22624 |
| Cross Junction, Frederick | 22625 |
| Gore, Frederick | 22637 |
| Hayfield, Frederick | 22603 |
| Lake Frederick, Frederick | 22630 |
| Middletown, Frederick | 22645 |
| Star Tannery, Frederick | 22654 |
| Stephens City, Frederick | 22655 |
| Stephenson, Frederick | 22656 |
| Whitacre, Frederick | 22625 |
| Winchester, Frederick | 22602, 22603 |