10 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 51537 | Harlan | 6,852 |
| 51570 | Shelby | 974 |
| 51531 | Elk Horn | 784 |
| 51530 | Earling | 629 |
| 51565 | Portsmouth | 530 |
| 51562 | Panama | 486 |
| 51446 | Irwin | 483 |
| 51527 | Defiance | 395 |
| 51447 | Kirkman | 152 |
| 51578 | Westphalia | 142 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 10 ZCTAs in Shelby County, Iowa (US Census).