Clay City is a village in Clay County, Illinois, home to about 723 people across 1.8 square miles. Its ZIP code is 62824.
Homes sold for a median of $85 per square foot in the three months ending August 2026, a seller’s market.
Mostly Clay City; also Sailor Springs
Each card is that ZIP code’s whole market, including any part outside Clay City. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | St. Louis Lambert International Airport (STL)109 miles away |
|---|---|
| Closer regional airport | Evansville Regional Airport (EVV)62 miles away |
| Nearest city of 250,000+ | St. Louis, MO102 miles away |
| Nearest city of 1 million+ | Chicago, IL222 miles away |
Straight-line distances from the center of Clay City; 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.
Clay City had 847 residents in the 2020 census, down 15% since 2000.
It’s the 806th largest of 1,450 towns in Illinois by population.
Clay County grew from 19,553 residents in 1900 to 13,288 in 2020.
Clay County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 89°F in summer, and winter lows average 21°F. About 48 inches of rain and melted snow fall in a typical year, with about 12 inches of snow.
Source: NOAA 1991–2020 climate normals, Flora, IL weather station (7 miles away).
4,623 jobs at 322 businesses in Clay County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
3 doctors and other health care providers list an office in Clay City.
Nearest hospitals
Providers with an office here
| Mental health providers | 2 |
|---|---|
| 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 Clay City CUSD 10. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Clay City Elem SchoolClay City | Pre-K–5 | 125 | Public | 1.0 mi |
| Clay City Jr High SchoolClay City | 6–8 | 60 | Public | 1.0 mi |
| Clay City High SchoolClay City | 9–12 | 68 | 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 Sailor Springs.
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.