Vandalia city, Illinois
Official LSAD Designation: Vandalia city • Census GEOID: 1777317
• Fayette County
Vandalia city is an incorporated city in Fayette County, Illinois. According to official records from the Census (2025), Vandalia city had an estimated population of 7,108 residents. Official Census Bureau geographic records classify this community under LSAD designation Vandalia city (GEOID 1777317).
Local Government Administration U.S. Census Bureau GMAF
City Of Vandalia
Municipal
Official Title:
City Clerk
Address:
431 W GALLATIN ST, VANDALIA IL 62471-2746
County Of Fayette
County
Official Title:
Treasurer
Address:
PO BOX 401, VANDALIA IL 62471-0401
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 7,108 | 2025 |
| Median Household Income | $45,469 | 2020-2024 |
| Median Home Value | $98,500 | 2020-2024 |
| Land Area | 8.15 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).