13 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 49242 | Hillsdale | 14,768 |
| 49250 | Jonesville | 5,674 |
| 49274 | Reading | 3,777 |
| 49249 | Jerome | 3,433 |
| 49266 | Osseo | 2,906 |
| 49232 | Camden | 2,829 |
| 49252 | Litchfield | 2,480 |
| 49271 | Pittsford | 2,354 |
| 49288 | Waldron | 1,517 |
| 49262 | North Adams | 1,298 |
| 49227 | Allen | 1,210 |
| 49282 | Somerset Center | 82 |
| 49258 | Mosherville | 10 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 13 ZCTAs in Hillsdale County, Michigan (US Census).