North Henderson is a village in Mercer County, Illinois, home to about 191 people across 0.2 square miles. Its ZIP code is 61466.
Homes sold for a median of $56 per square foot in the three months ending August 2026, a buyer’s market.
Mostly North Henderson
Each card is that ZIP code’s whole market, including any part outside North Henderson. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up North Henderson’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Chicago O'Hare International Airport (ORD)146 miles away |
|---|---|
| Closer regional airport | Quad City International Airport (MLI)24 miles away |
| Nearest city of 250,000+ | Madison, WI147 miles away |
| Nearest city of 1 million+ | Chicago, IL153 miles away |
Straight-line distances from the center of North Henderson; 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.
North Henderson had 162 residents in the 2020 census, down 13% since 2000.
It’s the 1220th largest of 1,450 towns in Illinois by population.
Mercer County grew from 20,945 residents in 1900 to 15,699 in 2020.
Mercer County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 84°F in summer, and winter lows average 14°F. About 39 inches of rain and melted snow fall in a typical year, with about 26 inches of snow.
Source: NOAA 1991–2020 climate normals, Galesburg, IL weather station (12 miles away).
2,200 jobs at 258 businesses in Mercer County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2022 (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.
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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.