Oskaloosa is a city in Jefferson County, Kansas, home to about 1,113 people across 1.0 square miles. Its ZIP code is 66066.
Homes sold for a median of $107 per square foot in the three months ending August 2026, a buyer’s market.
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 | Kansas City International Airport (MCI)33 miles away |
|---|---|
| Nearest city of 250,000+ | Kansas City, MO41 miles away |
| Nearest city of 1 million+ | Chicago, IL439 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 1,110 residents in the 2020 census, down 5% since 2000.
It’s the 183rd largest of 721 towns in Kansas by population.
Jefferson County grew from 17,533 residents in 1900 to 18,368 in 2020.
Jefferson County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 90°F in summer, and winter lows average 18°F. About 38.4 inches of rain and melted snow fall in a typical year, with about 16 inches of snow.
Source: NOAA 1991–2020 climate normals, Oskaloosa 4 Ne, KS weather station (3 miles away).
2,580 jobs at 316 businesses in Jefferson County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
12 doctors and other health care providers list an office in Oskaloosa.
Nearest hospitals
Providers with an office here
| Primary care doctors | 2 |
|---|---|
| Dentists | 1 |
| Nurse practitioners and physician assistants | 1 |
| Mental health providers | 3 |
| Physical and occupational therapists | 1 |
| Optometrists | 2 |
| Chiropractors | 2 |
| Pharmacies | 2 |
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.
Grocery stores (1 nearby)
Libraries (1 nearby)
Counts are within about 1 mile 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.
Public schools here are run by Oskaloosa Public Schools. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Oskaloosa ElemOskaloosa | Pre-K–6 | 255 | Public | 0.4 mi |
| Oskaloosa JR-SR High SchoolOskaloosa | 7–12 | 247 | Public | 0.4 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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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.