Keokuk County, Iowa ZIP codes
14 ZIP codes are in Keokuk County, plus 7 that cross in from neighboring counties.
- ZIP codes
- 14
- Population in these ZIPs
- 9,120
- Avg. median income
- $70,600population-weighted
- Cities & towns
- 14
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Keokuk County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 50104 | Gibson | 103 | $55,625 | $189,600 |
| 50136 | Keswick | 376 | $75,625 | $140,700 |
| 50255 | Thornburg | 51 | $39,722 | — |
| 50268 | What Cheer | 908 | $59,118 | $111,400 |
| 52231 | Harper | 539 | $90,893 | $150,300 |
| 52335 | South English | 644 | $52,162 | $175,400 |
| 52355 | Webster | 283 | $63,750 | $110,200 |
| 52550 | Delta | 552 | $57,745 | $119,000 |
| 52562 | Hayesville | 52 | — | $69,000 |
| 52563 | Hedrick | 1,602 | $98,438 | $168,300 |
| 52568 | Martinsburg | 80 | $44,375 | $66,300 |
| 52576 | Ollie | 371 | $63,750 | $122,800 |
| 52585 | Richland | 838 | $75,809 | $146,500 |
| 52591 | Sigourney | 2,721 | $62,404 | $142,600 |
ZIP codes partly in Keokuk County
These ZIP codes are mostly in a neighboring county but cover part of Keokuk County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 52248 | Keota | Washington County | 1,675 | $77,174 | $173,400 |
| 52316 | North English | Iowa County | 1,597 | $60,768 | $182,500 |
| 52356 | Wellman | Washington County | 2,664 | $57,321 | $254,200 |
| 52501 | Ottumwa | Wapello County | 30,371 | $63,426 | $121,600 |
| 52561 | Fremont | Mahaska County | 1,112 | $76,058 | $176,100 |
| 52580 | Packwood | Jefferson County | 711 | $53,368 | $157,400 |
| 52586 | Rose Hill | Mahaska County | 600 | $53,125 | $233,500 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Keokuk County
Nearby counties
Frequently asked questions
How many ZIP codes are in Keokuk County, Iowa?
14 ZIP codes are mainly in Keokuk County, and 7 more ZIP codes from neighboring areas reach partly into it.
What cities are in Keokuk County?
ZIP codes in Keokuk County use the city names Delta, Gibson, Harper, Hayesville, Hedrick, Keswick, Martinsburg, Ollie, Richland, Sigourney, South English and Thornburg and others.