Carlyle is a city in Clinton County, Illinois, home to about 2,980 people across 3.4 square miles. Its ZIP code is 62231.
Homes sold for a median of $102 per square foot in the three months ending August 2026, a buyer’s market.
Each card is that ZIP code’s whole market, including any part outside Carlyle. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Carlyle’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | St. Louis Lambert International Airport (STL)54 miles away |
|---|---|
| Closer regional airport | Scott AFB/Midamerica Airport (BLV)25 miles away |
| Nearest city of 250,000+ | St. Louis, MO47 miles away |
| Nearest city of 1 million+ | Chicago, IL240 miles away |
Straight-line distances from the center of Carlyle; 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.
Carlyle had 3,253 residents in the 2020 census, down 4% since 2000.
It’s the 429th largest of 1,450 towns in Illinois by population.
Clinton County grew from 19,824 residents in 1900 to 36,899 in 2020.
Clinton County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 88°F in summer, and winter lows average 22°F. About 46 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Carlyle Rsvr, IL weather station (2 miles away).
9,075 jobs at 913 businesses in Clinton County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
33 doctors and other health care providers list an office in Carlyle.
Nearest hospitals
Providers with an office here
| Primary care doctors | 3 |
|---|---|
| Specialist doctors | 3 |
| Dentists | 3 |
| Nurse practitioners and physician assistants | 7 |
| Mental health providers | 9 |
| Physical and occupational therapists | 4 |
| Chiropractors | 4 |
| Pharmacies | 3 |
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.
Parks (2 nearby)
Grocery stores
Pharmacies (1 nearby)
Libraries (1 nearby)
Theaters and performance venues
Counts are within about 1.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1818.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Carlyle CUSD 1. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Carlyle Elementary SchoolCarlyle | Pre-K–4 | 364 | Public | 1.0 mi |
| Carlyle Junior High SchoolCarlyle | 5–8 | 281 | Public | 1.1 mi |
| Carlyle High SchoolCarlyle | 9–12 | 281 | Public | 1.0 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 Huey.
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.