Mahaska County, Iowa ZIP codes
9 ZIP codes are in Mahaska County, plus 11 that cross in from neighboring counties. It's part of the Oskaloosa, IA micro area.
- ZIP codes
- 9
- Population in these ZIPs
- 20,715
- Avg. median income
- $68,100population-weighted
- Cities & towns
- 9
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Mahaska County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 50027 | Barnes City | 148 | $52,976 | $138,500 |
| 50143 | Leighton | 538 | $86,023 | $296,400 |
| 50207 | New Sharon | 2,325 | $76,053 | $228,400 |
| 52534 | Beacon | 321 | $57,986 | $136,300 |
| 52543 | Cedar | 541 | $83,511 | $281,600 |
| 52561 | Fremont | 1,112 | $76,058 | $176,100 |
| 52577 | Oskaloosa | 14,585 | $66,084 | $190,800 |
| 52586 | Rose Hill | 600 | $53,125 | $233,500 |
| 52595 | University Park | 545 | $66,667 | $159,200 |
ZIP codes partly in Mahaska County
These ZIP codes are mostly in a neighboring county but cover part of Mahaska County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 50044 | Bussey | Marion County | 901 | $75,417 | $176,100 |
| 50104 | Gibson | Keokuk County | 103 | $55,625 | $189,600 |
| 50153 | Lynnville | Jasper County | 890 | $73,798 | $292,800 |
| 50171 | Montezuma | Poweshiek County | 2,524 | $65,000 | $285,800 |
| 50219 | Pella | Marion County | 14,416 | $86,807 | $359,000 |
| 50251 | Sully | Jasper County | 1,365 | $91,061 | $261,500 |
| 50256 | Tracy | Marion County | 643 | $83,438 | $186,600 |
| 50268 | What Cheer | Keokuk County | 908 | $59,118 | $111,400 |
| 52501 | Ottumwa | Wapello County | 30,371 | $63,426 | $121,600 |
| 52550 | Delta | Keokuk County | 552 | $57,745 | $119,000 |
| 52553 | Eddyville | Wapello County | 1,846 | $64,583 | $189,200 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Mahaska County
Nearby counties
Frequently asked questions
How many ZIP codes are in Mahaska County, Iowa?
9 ZIP codes are mainly in Mahaska County, and 11 more ZIP codes from neighboring areas reach partly into it.
What cities are in Mahaska County?
ZIP codes in Mahaska County use the city names Barnes City, Beacon, Cedar, Fremont, Leighton, New Sharon, Oskaloosa, Rose Hill and University Park.
What metro area is Mahaska County in?
Mahaska County is part of the Oskaloosa, IA micropolitan statistical area.