Oskaloosa is a city in Mahaska County, Iowa, home to about 11,504 people across 8.0 square miles. Its ZIP code is 52577.
Homes sold for a median of $116 per square foot in the three months ending August 2026, a seller’s market.
Mostly Oskaloosa; also University Park and Keomah Village
Each card is that ZIP code’s whole market, including any part outside Oskaloosa. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Oskaloosa’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Des Moines International Airport (DSM)55 miles away |
|---|---|
| Nearest city of 250,000+ | Omaha, NE177 miles away |
| Nearest city of 1 million+ | Chicago, IL259 miles away |
Straight-line distances from the center of Oskaloosa; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Oskaloosa had 11,558 residents in the 2020 census, up 6% since 2000.
It’s the 34th largest of 1,019 towns in Iowa by population.
Mahaska County grew from 34,273 residents in 1900 to 22,190 in 2020.
Mahaska County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 12°F. About 38.9 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Oskaloosa, IA weather station (2 miles away).
7,582 jobs at 538 businesses in Mahaska County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
175 doctors and other health care providers list an office in Oskaloosa.
Nearest hospitals
Providers with an office here
| Primary care doctors | 29 |
|---|---|
| Specialist doctors | 19 |
| Dentists | 12 |
| Nurse practitioners and physician assistants | 41 |
| Mental health providers | 33 |
| Physical and occupational therapists | 26 |
| Optometrists | 5 |
| Chiropractors | 10 |
| Pharmacies | 8 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (5 nearby)
Grocery stores (4 nearby)
Pharmacies (4 nearby)
Libraries (4 nearby)
Museums
Theaters and performance venues (3 nearby)
Counts are within about 2 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Colleges and universities
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Oskaloosa Comm School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Oskaloosa Early Childhood Center - PKOskaloosa | Pre-K | 109 | Public | 1.4 mi |
| Oskaloosa Elementary SchoolOskaloosa | K–5 | 903 | Public | 1.4 mi |
| Oskaloosa Middle SchoolOskaloosa | 6–8 | 404 | Public | 1.0 mi |
| Oskaloosa High SchoolOskaloosa | 9–12 | 632 | Public | 1.1 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Oskaloosa Christian SchoolOskaloosa | TK–8 | 182 | Christian (no specific denomination) | 0.7 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with University Park, Keomah Village and Beacon.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.