ZIP CodesZIP codes in Allamakee County, Iowa
Allamakee County, Iowa has 7 ZIP codes in this list, from 52140 to 52172. They cover 7 places, among them Dorchester, Harpers Ferry, Lansing and New Albin.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 52140 | Dorchester | 73.8 | 43.442, -91.508 |
| 52146 | Harpers Ferry | 81.0 | 43.170, -91.219 |
| 52151 | Lansing | 115 | 43.366, -91.266 |
| 52160 | New Albin | 45.0 | 43.490, -91.294 |
| 52162 | Postville | 96.5 | 43.004, -91.548 |
| 52170 | Waterville | 48.8 | 43.208, -91.298 |
| 52172 | Waukon | 160 | 43.264, -91.480 |
The ZIP code areas of Allamakee County add up to about 620 square miles of land (1,605 sq km) as the Census Bureau draws them. The largest is 52172 (Waukon), with 160 square miles.
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Dorchester, IA 52140.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.