| Zip Code | City | Population ↓ |
|---|---|---|
| 49242 | Hillsdale | 14,718 |
| 49250 | Jonesville | 5,825 |
| 49274 | Reading | 3,727 |
| 49249 | Jerome | 3,350 |
| 49266 | Osseo | 3,338 |
| 49232 | Camden | 2,742 |
| 49252 | Litchfield | 2,475 |
| 49271 | Pittsford | 1,946 |
| 49288 | Waldron | 1,518 |
| 49262 | North Adams | 1,238 |
| 49227 | Allen | 1,194 |
| 49282 | Somerset Center | 71 |
| 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).