Rio is a village in Knox County, Illinois, home to about 205 people across 0.3 square miles. Its ZIP code is 61472.
Homes sold for a median of $76 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 Rio. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Chicago O'Hare International Airport (ORD)142 miles away |
|---|---|
| Closer regional airport | Quad City International Airport (MLI)24 miles away |
| Nearest city of 250,000+ | Madison, WI145 miles away |
| Nearest city of 1 million+ | Chicago, IL149 miles away |
Straight-line distances from the center of Rio; 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.
Rio had 209 residents in the 2020 census, down 13% since 2000.
It’s the 1200th largest of 1,450 towns in Illinois by population.
Knox County grew from 43,612 residents in 1900 to 49,967 in 2020.
Knox 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 (11 miles away).
14,242 jobs at 968 businesses in Knox 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.
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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.