12 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 50219 | Pella | 14,416 |
| 50138 | Knoxville | 11,117 |
| 50225 | Pleasantville | 3,364 |
| 50044 | Bussey | 901 |
| 50062 | Melcher Dallas | 789 |
| 50214 | Otley | 719 |
| 50163 | Melcher Dallas | 689 |
| 50256 | Tracy | 643 |
| 50119 | Harvey | 392 |
| 50057 | Columbia | 327 |
| 50116 | Hamilton | 261 |
| 50252 | Swan | 236 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 12 ZCTAs in Marion County, Iowa (US Census).