Mason city, Ohio
Official LSAD Designation: Mason city • Census GEOID: 3948188
• Warren County
Mason city is an incorporated city in Warren County, Ohio. According to official records from the Census (2025), Mason city had an estimated population of 35,834 residents. Official Census Bureau geographic records classify this community under LSAD designation Mason city (GEOID 3948188).
Local Government Administration U.S. Census Bureau GMAF
City Of Mason
Municipal
Official Title:
City Manager
Address:
6000 S MASON MONTGOMERY RD, MASON OH 45040-1699
County Of Warren
County
Official Title:
Director Of Financial Operations
Address:
WARREN COUNTY AUDITOR, 406 JUSTICE DR, LEBANON OH 45036
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 35,834 | 2025 |
| Median Household Income | $125,401 | 2020-2024 |
| Median Home Value | $426,200 | 2020-2024 |
| Land Area | 19.48 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).