| Localité | Code postal |
|---|---|
| Bangor, Northampton | 18013 |
| Bath, Northampton | 18014 |
| Bethlehem, Northampton | 18015, 18017, 18018, 18020 |
| Butztown, Northampton | 18017 |
| Catasauqua, Northampton | 18032 |
| Chapmans, Northampton | 18014 |
| Cherryville, Northampton | 18035 |
| College Hill, Northampton | 18042 |
| Danielsville, Northampton | 18038 |
| East Bangor, Northampton | 18013 |
| Easton, Northampton | 18040, 18042, 18045 |
| Forks, Northampton | 18040 |
| Freemansburg, Northampton | 18017 |
| Glendon, Northampton | 18042 |
| Hellertown, Northampton | 18055 |
| Lehigh Valley, Northampton | 18002 |
| Martins Creek, Northampton | 18063 |
| Mount Bethel, Northampton | 18343 |
| Nazareth, Northampton | 18064 |
| Northampton, Northampton | 18067 |
| Palmer, Northampton | 18045 |
| Pen Argyl, Northampton | 18072 |
| Portland, Northampton | 18351 |
| Roseto, Northampton | 18013 |
| Stockertown, Northampton | 18040, 18083 |
| Tatamy, Northampton | 18085 |