10 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 51555 | Missouri Valley | 4,881 |
| 51546 | Logan | 3,113 |
| 51579 | Woodbine | 2,205 |
| 51529 | Dunlap | 2,026 |
| 51557 | Mondamin | 788 |
| 51563 | Persia | 708 |
| 51564 | Pisgah | 512 |
| 51556 | Modale | 289 |
| 51545 | Little Sioux | 258 |
| 51550 | Magnolia | 142 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 10 ZCTAs in Harrison County, Iowa (US Census).