12 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 49015 | Battle Creek | 29,361 |
| 49014 | Battle Creek | 21,118 |
| 49037 | Battle Creek | 20,687 |
| 49017 | Battle Creek | 20,179 |
| 49068 | Marshall | 15,147 |
| 49224 | Albion | 13,280 |
| 49245 | Homer | 4,445 |
| 49051 | East Leroy | 2,970 |
| 49011 | Athens | 2,463 |
| 49092 | Tekonsha | 1,945 |
| 49033 | Ceresco | 1,790 |
| 49029 | Burlington | 1,341 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 12 ZCTAs in Calhoun County, Michigan (US Census).