| Zip Code | City | Population ↓ |
|---|---|---|
| 49091 | Sturgis | 19,831 |
| 49093 | Three Rivers | 18,445 |
| 49099 | White Pigeon | 5,724 |
| 49042 | Constantine | 4,747 |
| 49040 | Colon | 3,436 |
| 49032 | Centreville | 3,232 |
| 49072 | Mendon | 2,753 |
| 49030 | Burr Oak | 2,486 |
| 49066 | Leonidas | 645 |
| 49075 | Nottawa | 166 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 10 ZCTAs in St. Joseph County, Michigan (US Census).