Lacon city, Illinois
Official LSAD Designation: Lacon city • Census GEOID: 1740559
• Marshall County
Lacon city is an incorporated city in Marshall County, Illinois. According to official records from the Census (2025), Lacon city had an estimated population of 1,822 residents. Official Census Bureau geographic records classify this community under LSAD designation Lacon city (GEOID 1740559).
Local Government Administration U.S. Census Bureau GMAF
City Of Lacon
Municipal
Official Title:
Supervisor
Address:
PO BOX 204, LACON IL 61540-0204
County Of Marshall
County
Official Title:
County Clerk
Address:
PO BOX 328, LACON IL 61540-0328
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 1,822 | 2025 |
| Median Household Income | $63,162 | 2020-2024 |
| Median Home Value | $121,900 | 2020-2024 |
| Land Area | 1.64 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).