| Zip Code | City | Population ↓ |
|---|---|---|
| 48706 | Bay City | 39,182 |
| 48708 | Bay City | 25,857 |
| 48732 | Essexville | 11,204 |
| 48650 | Pinconning | 6,462 |
| 48611 | Auburn | 6,135 |
| 48634 | Linwood | 4,613 |
| 48631 | Kawkawlin | 3,924 |
| 48747 | Munger | 1,720 |
| 48613 | Bentley | 1,039 |
| 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).