9 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 52577 | Oskaloosa | 14,336 |
| 50207 | New Sharon | 2,360 |
| 52561 | Fremont | 1,179 |
| 50143 | Leighton | 621 |
| 52595 | University Park | 607 |
| 52586 | Rose Hill | 558 |
| 52543 | Cedar | 486 |
| 52534 | Beacon | 423 |
| 50027 | Barnes City | 169 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 9 ZCTAs in Mahaska County, Iowa (US Census).