100 Smallest ZIP Codes in the United States by Population in Allamakee County, Iowa
Explore the 100 smallest ZIP codes in the United States ranked by population using U.S. Census demographic data. This page lists ZIP codes located in Allamakee County, Iowa.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 52140 | DORCHESTER | IA | 453 |
| 2 | 52170 | WATERVILLE | IA | 504 |
| 3 | 52146 | HARPERS FERRY | IA | 866 |
| 4 | 52160 | NEW ALBIN | IA | 994 |
| 5 | 52151 | LANSING | IA | 1,869 |
| 6 | 52162 | POSTVILLE | IA | 3,548 |
| 7 | 52172 | WAUKON | IA | 5,982 |