15 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 54935 | Fond Du Lac | 41,613 |
| 54937 | Fond Du Lac | 21,687 |
| 53963 | Waupun | 13,952 |
| 54971 | Ripon | 10,907 |
| 53010 | Campbellsport | 7,444 |
| 53065 | Oakfield | 2,351 |
| 53049 | Malone | 2,298 |
| 53919 | Brandon | 2,292 |
| 54979 | Van Dyne | 2,037 |
| 53057 | Mount Calvary | 1,882 |
| 53019 | Eden | 1,876 |
| 53079 | Saint Cloud | 1,420 |
| 54974 | Rosendale | 1,415 |
| 54932 | Eldorado | 1,218 |
| 53931 | Fairwater | 350 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 15 ZCTAs in Fond du Lac County, Wisconsin (US Census).