14 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 52591 | Sigourney | 2,646 |
| 52563 | Hedrick | 1,824 |
| 50268 | What Cheer | 997 |
| 52585 | Richland | 849 |
| 52550 | Delta | 635 |
| 52335 | South English | 608 |
| 52231 | Harper | 497 |
| 50136 | Keswick | 411 |
| 52576 | Ollie | 402 |
| 52355 | Webster | 282 |
| 50104 | Gibson | 99 |
| 52568 | Martinsburg | 73 |
| 52562 | Hayesville | 62 |
| 50255 | Thornburg | 40 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 14 ZCTAs in Keokuk County, Iowa (US Census).