Janesville is a community in Coles County, Illinois, home to about 39 people across 0.1 square miles. It has no ZIP code of its own: it’s part of 62440.
Part is in Janesville, part in Lerna
We’re writing up Janesville’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Indianapolis International Airport (IND)107 miles away |
|---|---|
| Closer regional airport | Decatur Airport (DEC)44 miles away |
| Nearest city of 250,000+ | Indianapolis, IN115 miles away |
| Nearest city of 1 million+ | Chicago, IL171 miles away |
Straight-line distances from the center of Janesville; 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 1414th largest of 1,450 towns in Illinois by population.
Coles County grew from 34,146 residents in 1900 to 46,863 in 2020.
Coles 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 20°F. About 35.9 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Mattoon Coles Co Ap, IL weather station (6 miles away).
20,638 jobs at 1,112 businesses in Coles County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
2 doctors and other health care providers list an office in Janesville.
Nearest hospitals
Providers with an office here
| Physical and occupational therapists | 1 |
|---|---|
| Chiropractors | 1 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Public schools here are run by Clk/Cls/Cmbn/Dglas/Edgr/Mltr/Shlb. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Lerna BridgesLerna | 6–12 | — | Alternative Education | 2.2 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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Shares ZIP codes with Lerna.
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.