7 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 52101 | Decorah | 12,539 |
| 52132 | Calmar | 1,856 |
| 52161 | Ossian | 1,558 |
| 52165 | Ridgeway | 1,125 |
| 52144 | Fort Atkinson | 1,056 |
| 52133 | Castalia | 711 |
| 52168 | Spillville | 409 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 7 ZCTAs in Winneshiek County, Iowa (US Census).