Marseilles city, Illinois
Official LSAD Designation: Marseilles city • Census GEOID: 1747150
• LaSalle County
Marseilles city is an incorporated city in LaSalle County, Illinois. According to official records from the Census (2025), Marseilles city had an estimated population of 4,809 residents. Official Census Bureau geographic records classify this community under LSAD designation Marseilles city (GEOID 1747150).
Local Government Administration U.S. Census Bureau GMAF
City Of Marseilles
Municipal
Official Title:
City Clerk
Address:
209 LINCOLN ST, 2, MARSEILLES IL 61341-1995
County Of Lasalle
County
Official Title:
Chairman
Address:
707 E ETNA RD, ROOM 245, OTTAWA IL 61350-1047
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 4,809 | 2025 |
| Median Household Income | $58,217 | 2020-2024 |
| Median Home Value | $142,500 | 2020-2024 |
| Land Area | 9.44 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).