12 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 46350 | La Porte | 44,763 |
| 46360 | Michigan City | 43,817 |
| 46391 | Westville | 8,986 |
| 46574 | Walkerton | 7,426 |
| 46371 | Rolling Prairie | 3,396 |
| 46390 | Wanatah | 2,554 |
| 46382 | Union Mills | 1,835 |
| 46340 | Hanna | 1,524 |
| 46346 | Kingsford Heights | 1,358 |
| 46348 | La Crosse | 1,217 |
| 46365 | Mill Creek | 992 |
| 46345 | Kingsbury | 66 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 12 ZCTAs in LaPorte County, Indiana (US Census).