8 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 50677 | Waverly | 12,655 |
| 50674 | Sumner | 3,596 |
| 50622 | Denver | 3,288 |
| 50676 | Tripoli | 2,128 |
| 50647 | Janesville | 2,073 |
| 50668 | Readlyn | 1,231 |
| 50666 | Plainfield | 768 |
| 50631 | Frederika | 198 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Bremer County, Iowa (US Census).