7 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 48858 | Mount Pleasant | 42,732 |
| 48883 | Shepherd | 6,755 |
| 48893 | Weidman | 5,660 |
| 49310 | Blanchard | 2,989 |
| 48859 | Mount Pleasant | 2,244 |
| 48878 | Rosebush | 1,253 |
| 48896 | Winn | 218 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 7 ZCTAs in Isabella County, Michigan (US Census).