Oskaloosa, IA micro area ZIP codes
The Oskaloosa, IA micropolitan statistical area (CBSA 36820) covers 1 county in Iowa and 9 ZIP codes.
- ZIP codes
- 9
- Population
- 20,715
- Avg. median income
- $68,100population-weighted
- Counties
- 1
Click anywhere on the map to see which ZIP code it's in.
Counties in the Oskaloosa, IA area
ZIP codes in the Oskaloosa, IA area
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 50027 | Barnes City | Mahaska County | 148 | $52,976 | $138,500 |
| 50143 | Leighton | Mahaska County | 538 | $86,023 | $296,400 |
| 50207 | New Sharon | Mahaska County | 2,325 | $76,053 | $228,400 |
| 52534 | Beacon | Mahaska County | 321 | $57,986 | $136,300 |
| 52543 | Cedar | Mahaska County | 541 | $83,511 | $281,600 |
| 52561 | Fremont | Mahaska County | 1,112 | $76,058 | $176,100 |
| 52577 | Oskaloosa | Mahaska County | 14,585 | $66,084 | $190,800 |
| 52586 | Rose Hill | Mahaska County | 600 | $53,125 | $233,500 |
| 52595 | University Park | Mahaska County | 545 | $66,667 | $159,200 |
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
Frequently asked questions
How many ZIP codes are in the Oskaloosa, IA micro area?
9 ZIP codes, based on each ZIP code's main county.
Which counties make up the Oskaloosa, IA area?
Mahaska County.
What is an MSA?
A metropolitan statistical area (MSA) is a core city of 50,000+ people plus the surrounding counties tied to it by commuting, as defined by the U.S. Office of Management and Budget. Micropolitan areas have a core of 10,000–50,000. Together they are called core-based statistical areas (CBSAs).