100 Smallest ZIP Codes in the United States by Population in Chickasaw 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 Chickasaw County, Iowa.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 50603 | ALTA VISTA | IA | 342 |
| 2 | 52154 | LAWLER | IA | 664 |
| 3 | 50645 | IONIA | IA | 1,391 |
| 4 | 50630 | FREDERICKSBURG | IA | 1,568 |
| 5 | 50658 | NASHUA | IA | 2,427 |
| 6 | 50659 | NEW HAMPTON | IA | 5,986 |