Marathon city, Florida
Official LSAD Designation: Marathon city • Census GEOID: 1243000
• Monroe County
Marathon city is an incorporated city in Monroe County, Florida. According to official records from the Census (2025), Marathon city had an estimated population of 10,060 residents. Official Census Bureau geographic records classify this community under LSAD designation Marathon city (GEOID 1243000).
Local Government Administration U.S. Census Bureau GMAF
City Of Marathon
Municipal
Official Title:
City Clerk
Address:
9805 OVERSEAS HWY, MARATHON FL 33050-3339
County Of Monroe
County
Official Title:
Mayor
Address:
1100 SIMONTON, KEY WEST FL 33040-2763
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 10,060 | 2025 |
| Median Household Income | $89,355 | 2020-2024 |
| Median Home Value | $725,800 | 2020-2024 |
| Land Area | 8.45 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).