9 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 50401 | Mason City | 28,818 |
| 50428 | Clear Lake | 9,093 |
| 50469 | Rockwell | 1,495 |
| 50479 | Thornton | 783 |
| 50482 | Ventura | 701 |
| 50464 | Plymouth | 573 |
| 50477 | Swaledale | 219 |
| 50433 | Dougherty | 125 |
| 50467 | Rock Falls | 76 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 9 ZCTAs in Cerro Gordo County, Iowa (US Census).