9 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 46383 | Valparaiso | 41,811 |
| 46385 | Valparaiso | 41,304 |
| 46368 | Portage | 39,947 |
| 46304 | Chesterton | 27,204 |
| 46341 | Hebron | 9,984 |
| 46347 | Kouts | 4,853 |
| 46301 | Beverly Shores | 578 |
| 46393 | Wheeler | 148 |
| 46302 | Boone Grove | 51 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 9 ZCTAs in Porter County, Indiana (US Census).