| Zip Code | City | Population ↓ |
|---|---|---|
| 52172 | Waukon | 5,982 |
| 52162 | Postville | 3,548 |
| 52159 | Monona | 2,412 |
| 52151 | Lansing | 1,869 |
| 52160 | New Albin | 994 |
| 52146 | Harpers Ferry | 866 |
| 52170 | Waterville | 504 |
| 52140 | Dorchester | 453 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 8 ZCTAs in Allamakee County, Iowa (US Census).