100 Smallest ZIP Codes in the United States by Population in Floyd 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 Floyd County, Iowa.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 50620 | COLWELL | IA | 55 |
| 2 | 50653 | MARBLE ROCK | IA | 504 |
| 3 | 50471 | RUDD | IA | 680 |
| 4 | 50435 | FLOYD | IA | 687 |
| 5 | 50468 | ROCKFORD | IA | 1,553 |
| 6 | 50458 | NORA SPRINGS | IA | 2,297 |
| 7 | 50616 | CHARLES CITY | IA | 9,544 |