Columbia County, Wisconsin Zip Codes by Population (2024)
The most populated Zip Code in Columbia County, Wisconsin is 53901, located in Portage. * 2024 populations estimated based on the latest ACS 5-year data.
| Portage | 14,978 |
| Columbus | 8,810 |
| Lodi | 8,706 |
| Pardeeville | 6,782 |
| Poynette | 5,806 |
| Rio | 3,219 |
| Randolph | 3,035 |
| Fall River | 2,448 |
| Cambria | 2,224 |
| Arlington | 1,433 |
| Wyocena | 324 |
| Friesland | 261 |
| Doylestown | 102 |