Allamakee County, Iowa ZIP codes
8 ZIP codes are in Allamakee County, plus 2 that cross in from neighboring counties.
- ZIP codes
- 8
- Population in these ZIPs
- 16,701
- Avg. median income
- $69,400population-weighted
- Cities & towns
- 8
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ZIP codes in Allamakee County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 52140 | Dorchester | 671 | $72,188 | $398,800 |
| 52146 | Harpers Ferry | 752 | $61,750 | $302,300 |
| 52151 | Lansing | 1,886 | $69,938 | $286,500 |
| 52159 | Monona | 2,398 | $74,259 | $241,900 |
| 52160 | New Albin | 818 | $85,204 | $242,500 |
| 52162 | Postville | 3,744 | $64,125 | $214,600 |
| 52170 | Waterville | 555 | $72,788 | $314,400 |
| 52172 | Waukon | 5,877 | $68,875 | $246,500 |
ZIP codes partly in Allamakee County
These ZIP codes are mostly in a neighboring county but cover part of Allamakee County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 52101 | Decorah | Winneshiek County | 12,706 | $73,484 | $327,700 |
| 52156 | Luana | Clayton County | 769 | $99,554 | $328,500 |
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 Allamakee County
Nearby counties
Frequently asked questions
How many ZIP codes are in Allamakee County, Iowa?
8 ZIP codes are mainly in Allamakee County, and 2 more ZIP codes from neighboring areas reach partly into it.
What cities are in Allamakee County?
ZIP codes in Allamakee County use the city names Dorchester, Harpers Ferry, Lansing, Monona, New Albin, Postville, Waterville and Waukon.