10 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 51555 | Missouri Valley | 4,858 |
| 51546 | Logan | 3,067 |
| 51579 | Woodbine | 2,116 |
| 51529 | Dunlap | 1,992 |
| 51557 | Mondamin | 834 |
| 51563 | Persia | 737 |
| 51564 | Pisgah | 479 |
| 51556 | Modale | 359 |
| 51545 | Little Sioux | 271 |
| 51550 | Magnolia | 137 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 10 ZCTAs in Harrison County, Iowa (US Census).