ZIP CodesZIP codes in Mahaska County, Iowa
Mahaska County, Iowa has 9 ZIP codes in this list, from 50027 to 52595. They cover 9 places, among them Barnes City, Leighton, New Sharon and Beacon.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 50027 | Barnes City | 27.7 | 41.488, -92.470 |
| 50143 | Leighton | 35.5 | 41.365, -92.808 |
| 50207 | New Sharon | 143 | 41.464, -92.685 |
| 52534 | Beacon | 0.8 | 41.272, -92.682 |
| 52543 | Cedar | 21.6 | 41.212, -92.509 |
| 52561 | Fremont | 37.3 | 41.212, -92.436 |
| 52577 | Oskaloosa | 158 | 41.294, -92.644 |
| 52586 | Rose Hill | 46.5 | 41.331, -92.472 |
| 52595 | University Park | 0.5 | 41.286, -92.618 |
The ZIP code areas of Mahaska County add up to about 471 square miles of land (1,220 sq km) as the Census Bureau draws them. The largest is 52577 (Oskaloosa), with 158 square miles.
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Barnes City, IA 50027.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.