Effingham is a city in Atchison County, Kansas, home to about 786 people across 0.6 square miles. Its ZIP code is 66023.
Homes sold for a median of $102 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside Effingham. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Effingham’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)40 miles away |
|---|---|
| Nearest city of 250,000+ | Kansas City, MO53 miles away |
| Nearest city of 1 million+ | Chicago, IL435 miles away |
Straight-line distances from the center of Effingham; 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.
Effingham had 495 residents in the 2020 census, down 16% since 2000.
It’s the 238th largest of 721 towns in Kansas by population.
Atchison County grew from 28,606 residents in 1900 to 16,348 in 2020.
Atchison County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 88°F in summer, and winter lows average 16°F. About 38 inches of rain and melted snow fall in a typical year, with about 11 inches of snow.
Source: NOAA 1991–2020 climate normals, Horton, KS weather station (12 miles away).
5,385 jobs at 364 businesses in Atchison County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
Nearest hospitals
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
Public schools here are run by Atchison Co Comm Schools. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Atchison County Community Elementary SchoolEffingham | Pre-K–6 | 244 | Public | 0.3 mi |
| Atchison County Community JR/SR HighEffingham | 7–12 | 254 | Public | 0.5 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.