13 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 53901 | Portage | 14,654 |
| 53925 | Columbus | 8,956 |
| 53555 | Lodi | 8,708 |
| 53954 | Pardeeville | 6,579 |
| 53955 | Poynette | 5,909 |
| 53956 | Randolph | 3,238 |
| 53960 | Rio | 3,235 |
| 53932 | Fall River | 2,470 |
| 53923 | Cambria | 2,294 |
| 53911 | Arlington | 1,480 |
| 53969 | Wyocena | 361 |
| 53935 | Friesland | 269 |
| 53928 | Doylestown | 86 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 13 ZCTAs in Columbia County, Wisconsin (US Census).