13 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 49242 | Hillsdale | 14,750 |
| 49250 | Jonesville | 5,653 |
| 49274 | Reading | 3,679 |
| 49249 | Jerome | 3,462 |
| 49266 | Osseo | 2,982 |
| 49232 | Camden | 2,790 |
| 49252 | Litchfield | 2,556 |
| 49271 | Pittsford | 2,280 |
| 49288 | Waldron | 1,483 |
| 49227 | Allen | 1,287 |
| 49262 | North Adams | 1,258 |
| 49282 | Somerset Center | 82 |
| 49258 | Mosherville | 29 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 13 ZCTAs in Hillsdale County, Michigan (US Census).