100 Smallest ZIP Codes in the United States by Population in Keokuk 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 Keokuk County, Iowa.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 50255 | THORNBURG | IA | 56 |
| 2 | 52562 | HAYESVILLE | IA | 68 |
| 3 | 52568 | MARTINSBURG | IA | 84 |
| 4 | 50104 | GIBSON | IA | 93 |
| 5 | 52355 | WEBSTER | IA | 289 |
| 6 | 52576 | OLLIE | IA | 402 |
| 7 | 50136 | KESWICK | IA | 408 |
| 8 | 52231 | HARPER | IA | 439 |
| 9 | 52335 | SOUTH ENGLISH | IA | 604 |
| 10 | 52550 | DELTA | IA | 640 |
| 11 | 52585 | RICHLAND | IA | 795 |
| 12 | 50268 | WHAT CHEER | IA | 1,101 |
| 13 | 52248 | KEOTA | IA | 1,655 |
| 14 | 52563 | HEDRICK | IA | 1,770 |
| 15 | 52591 | SIGOURNEY | IA | 2,674 |