12 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 49015 | Battle Creek | 27,765 |
| 49014 | Battle Creek | 21,980 |
| 49017 | Battle Creek | 21,295 |
| 49037 | Battle Creek | 20,550 |
| 49068 | Marshall | 14,729 |
| 49224 | Albion | 13,447 |
| 49245 | Homer | 4,547 |
| 49051 | East Leroy | 2,787 |
| 49011 | Athens | 2,236 |
| 49092 | Tekonsha | 1,908 |
| 49033 | Ceresco | 1,719 |
| 49029 | Burlington | 1,415 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 12 ZCTAs in Calhoun County, Michigan (US Census).