Winneshiek County, Iowa ZIP codes
8 ZIP codes are in Winneshiek County, plus 5 that cross in from neighboring counties.
- ZIP codes
- 8
- Population in these ZIPs
- 19,199
- Avg. median income
- $78,100population-weighted
- Cities & towns
- 8
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ZIP codes in Winneshiek County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 52101 | Decorah | 12,706 | $73,484 | $327,700 |
| 52132 | Calmar | 1,759 | $100,559 | $270,200 |
| 52133 | Castalia | 673 | $76,250 | $287,500 |
| 52144 | Fort Atkinson | 1,075 | $84,609 | $313,000 |
| 52149 PO Box | Highlandville | — | — | — |
| 52161 | Ossian | 1,532 | $87,870 | $274,000 |
| 52165 | Ridgeway | 1,098 | $85,227 | $347,400 |
| 52168 | Spillville | 356 | $54,375 | $174,400 |
ZIP codes partly in Winneshiek County
These ZIP codes are mostly in a neighboring county but cover part of Winneshiek County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 52136 | Cresco | Howard County | 5,840 | $70,778 | $210,600 |
| 52140 | Dorchester | Allamakee County | 671 | $72,188 | $398,800 |
| 52162 | Postville | Allamakee County | 3,744 | $64,125 | $214,600 |
| 52171 | Waucoma | Fayette County | 1,314 | $94,904 | $237,800 |
| 52172 | Waukon | Allamakee County | 5,877 | $68,875 | $246,500 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Winneshiek County
Nearby counties
Frequently asked questions
How many ZIP codes are in Winneshiek County, Iowa?
8 ZIP codes are mainly in Winneshiek County, and 5 more ZIP codes from neighboring areas reach partly into it.
What cities are in Winneshiek County?
ZIP codes in Winneshiek County use the city names Calmar, Castalia, Decorah, Fort Atkinson, Highlandville, Ossian, Ridgeway and Spillville.