15 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 54935 | Fond Du Lac | 42,498 |
| 54937 | Fond Du Lac | 21,029 |
| 53963 | Waupun | 13,907 |
| 54971 | Ripon | 10,758 |
| 53010 | Campbellsport | 7,545 |
| 53065 | Oakfield | 2,383 |
| 53049 | Malone | 2,325 |
| 53919 | Brandon | 2,224 |
| 53057 | Mount Calvary | 1,846 |
| 54979 | Van Dyne | 1,786 |
| 53019 | Eden | 1,761 |
| 54974 | Rosendale | 1,566 |
| 53079 | Saint Cloud | 1,310 |
| 54932 | Eldorado | 1,307 |
| 53931 | Fairwater | 339 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 15 ZCTAs in Fond du Lac County, Wisconsin (US Census).