Swansea is a village in St. Clair County, Illinois, home to about 14,710 people across 6.5 square miles. Its ZIP code is 62226, and parts of 62223 are in Swansea too.
Homes sold for a median of $120 per square foot in the three months ending August 2026, a seller’s market.
Mostly Swansea; also Belleville
Mostly Belleville; part is in Swansea
Each card is that ZIP code’s whole market, including any part outside Swansea. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Swansea’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)25 miles away |
|---|---|
| Closer regional airport | Scott AFB/Midamerica Airport (BLV)9 miles away |
| Nearest city of 250,000+ | St. Louis, MO15 miles away |
| Nearest city of 1 million+ | Chicago, IL259 miles away |
Straight-line distances from the center of Swansea; 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.
Swansea had 14,386 residents in the 2020 census, up 36% since 2000.
It’s the 167th 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).
612 doctors and other health care providers list an office in Swansea.
Nearest hospitals
Providers with an office here
| Primary care doctors | 46 |
|---|---|
| Specialist doctors | 173 |
| Dentists | 40 |
| Nurse practitioners and physician assistants | 136 |
| Mental health providers | 120 |
| Physical and occupational therapists | 57 |
| Optometrists | 14 |
| Chiropractors | 26 |
| Pharmacies | 10 |
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 (19 nearby)
Grocery stores (4 nearby)
Pharmacies (5 nearby)
Libraries (1 nearby)
Museums (1 nearby)
Counts are within about 2 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 High Mount SD 116, Wolf Branch SD 113, Belleville SD 118 and others. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| High Mount Elem SchoolSwansea | Pre-K–8 | 325 | Public | 0.8 mi |
| Wolf Branch Elem SchoolSwansea | Pre-K–4 | 482 | Public | 1.6 mi |
| Abraham Lincoln Elem SchoolBelleville | K–6 | 542 | Public | 0.8 mi |
| Union Elem SchoolBelleville | K–6 | 432 | Public | 0.9 mi |
| Saint Clair Co ROE Safe SchoolBelleville | 5–12 | — | Alternative Education | 1.2 mi |
| Wolf Branch Middle SchoolSwansea | 5–8 | 341 | Public | 1.4 mi |
| West Jr High SchoolBelleville | 7–8 | 364 | Public | 0.8 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Elite Scholars Steam AcademySwansea | Pre-K–6 | 21 | Nonsectarian | 1.3 mi |
| Althoff Catholic High SchoolBelleville | 9–12 | 335 | Roman Catholic | 1.7 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.
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.