10 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 48706 | Bay City | 38,974 |
| 48708 | Bay City | 25,635 |
| 48732 | Essexville | 11,340 |
| 48650 | Pinconning | 6,510 |
| 48611 | Auburn | 6,093 |
| 48634 | Linwood | 4,334 |
| 48631 | Kawkawlin | 3,681 |
| 48747 | Munger | 1,549 |
| 48613 | Bentley | 1,081 |
| 48710 | University Center | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 10 ZCTAs in Bay County, Michigan (US Census).