13 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 53901 | Portage | 14,291 |
| 53555 | Lodi | 8,933 |
| 53925 | Columbus | 8,754 |
| 53954 | Pardeeville | 6,678 |
| 53955 | Poynette | 6,125 |
| 53956 | Randolph | 3,477 |
| 53960 | Rio | 3,396 |
| 53932 | Fall River | 2,495 |
| 53923 | Cambria | 2,295 |
| 53911 | Arlington | 1,450 |
| 53969 | Wyocena | 329 |
| 53935 | Friesland | 297 |
| 53928 | Doylestown | 63 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 13 ZCTAs in Columbia County, Wisconsin (US Census).