Keithsburg is a city in Mercer County, Illinois, home to about 490 people across 2.6 square miles. Its ZIP code is 61442.
Mostly Keithsburg
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| Nearest major airport | Des Moines International Airport (DSM)145 miles away |
|---|---|
| Closer regional airport | Southeast Iowa Regional Airport (BRL)24 miles away |
| Nearest city of 250,000+ | Madison, WI157 miles away |
| Nearest city of 1 million+ | Chicago, IL175 miles away |
Straight-line distances from the center of Keithsburg; 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.
Keithsburg had 550 residents in the 2020 census, down 23% since 2000.
It’s the 944th 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 86°F in summer, and winter lows average 15°F. About 36.3 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, New Boston Dam 17, IL weather station (9 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.