Mascoutah city, Illinois
Official LSAD Designation: Mascoutah city • Census GEOID: 1747423
• St. Clair County
Mascoutah city is an incorporated city in St. Clair County, Illinois. According to official records from the Census (2025), Mascoutah city had an estimated population of 9,239 residents. Official Census Bureau geographic records classify this community under LSAD designation Mascoutah city (GEOID 1747423).
Local Government Administration U.S. Census Bureau GMAF
City Of Mascoutah
Municipal
Official Title:
City Clerk
Address:
3 W MAIN ST, MASCOUTAH IL 62258-2044
County Of St Clair
County
Official Title:
Auditor
Address:
10 PUBLIC SQ, BELLEVILLE IL 62220-1623
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 9,239 | 2025 |
| Median Household Income | $97,375 | 2020-2024 |
| Median Home Value | $224,900 | 2020-2024 |
| Land Area | 9.64 sq mi | Gazetteer (2026) |
| Civic & Public Services | Hospitals, Libraries, Colleges | CMS / IMLS / IPEDS |
| Schools & Districts | NCES Directory Listings | Provided by k12guides.com |
| Nearby Airports | Landing Facilities | Provided by airport-data.com |
| Climate & Weather | NOAA 30-Year Normals | 1991–2020 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).