| Locality | Post Code |
|---|---|
| Beverly Shores, Porter | 46301 |
| Boone Grove, Porter | 46302 |
| Burns Harbor, Porter | 46304 |
| Chesterton, Porter | 46304 |
| Dune Acres, Porter | 46304 |
| Hebron, Porter | 46341 |
| Kouts, Porter | 46347 |
| Ogden Dunes, Porter | 46368 |
| Portage, Porter | 46368 |
| Porter, Porter | 46304 |
| Valparaiso, Porter | 46383, 46384, 46385 |
| Wheeler, Porter | 46393 |