10 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 48706 | Bay City | 38,756 |
| 48708 | Bay City | 25,751 |
| 48732 | Essexville | 11,308 |
| 48650 | Pinconning | 6,662 |
| 48611 | Auburn | 6,013 |
| 48634 | Linwood | 4,395 |
| 48631 | Kawkawlin | 4,058 |
| 48747 | Munger | 1,488 |
| 48613 | Bentley | 986 |
| 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).