Smithton is a village in St. Clair County, Illinois, home to about 3,680 people across 4.4 square miles. Its ZIP code is 62285, and parts of 62220 and 62243 are in Smithton too.
Homes sold for a median of $136 per square foot in the three months ending August 2026, a seller’s market.
Mostly Smithton
Mostly Belleville; part is in Smithton
Mostly Freeburg; part is in Smithton
Each card is that ZIP code’s whole market, including any part outside Smithton. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Smithton’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)29 miles away |
|---|---|
| Closer regional airport | Scott AFB/Midamerica Airport (BLV)10 miles away |
| Nearest city of 250,000+ | St. Louis, MO19 miles away |
| Nearest city of 1 million+ | Chicago, IL263 miles away |
Straight-line distances from the center of Smithton; 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.
Smithton had 4,006 residents in the 2020 census, up 78% since 2000.
It’s the 400th largest of 1,450 towns in Illinois by population.
St. Clair County grew from 86,685 residents in 1900 to 257,400 in 2020.
St. Clair County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 90°F in summer, and winter lows average 24°F. About 43.4 inches of rain and melted snow fall in a typical year, with about 11 inches of snow.
Source: NOAA 1991–2020 climate normals, Belleville Siu Rsch, IL weather station (9 miles away).
72,871 jobs at 4,973 businesses in St. Clair County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2022 (private employers; jobs counted where people work).
12 doctors and other health care providers list an office in Smithton.
Nearest hospitals
Providers with an office here
| Primary care doctors | 1 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 3 |
| Nurse practitioners and physician assistants | 1 |
| Mental health providers | 1 |
| Physical and occupational therapists | 1 |
| Chiropractors | 4 |
| Pharmacies | 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.
Grocery stores
Libraries
Museums
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.
Public schools here are run by Smithton CCSD 130. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Smithton Elem SchoolSmithton | Pre-K–8 | 541 | Public | 3.1 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| St John the Baptist SchoolSmithton | Pre-K–8 | 64 | Roman Catholic | 3.0 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Belleville and Freeburg.
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.