Osco is a community in Henry County, Illinois, home to about 74 people across 0.2 square miles. Its ZIP code is 61274.
Mostly Osco
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| Nearest major airport | Chicago O'Hare International Airport (ORD)129 miles away |
|---|---|
| Closer regional airport | Quad City International Airport (MLI)14 miles away |
| Nearest city of 250,000+ | Madison, WI127 miles away |
| Nearest city of 1 million+ | Chicago, IL137 miles away |
Straight-line distances from the center of Osco; 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.
It’s the 1369th largest of 1,450 towns in Illinois by population.
Henry County grew from 40,049 residents in 1900 to 49,284 in 2020.
Henry 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 15°F. About 39.1 inches of rain and melted snow fall in a typical year, with about 28 inches of snow.
Source: NOAA 1991–2020 climate normals, Geneseo, IL weather station (9 miles away).
13,162 jobs at 1,037 businesses in Henry 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.