Mason City city, Illinois
Official LSAD Designation: Mason City city • Census GEOID: 1747475
• Mason County
Mason City city is an incorporated city in Mason County, Illinois. According to official records from the Census (2025), Mason City city had an estimated population of 1,956 residents. Official Census Bureau geographic records classify this community under LSAD designation Mason City city (GEOID 1747475).
Local Government Administration U.S. Census Bureau GMAF
City Of Mason City
Municipal
Official Title:
City Clerk
Address:
145 S MAIN ST, MASON CITY IL 62664-1460
County Of Mason
County
Official Title:
Treasurer
Address:
COUNTY BUILDING, HAVANA IL 62644
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 1,956 | 2025 |
| Median Household Income | $66,524 | 2020-2024 |
| Median Home Value | $91,100 | 2020-2024 |
| Land Area | 1.01 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).