Marathon
City in Monroe County, Florida

Marathon is a city in Monroe County, Florida, with 9,689 residents (2020 Census). It sits at 3 ft (1 m) above sea level. The nearest town is Key Colony Beach, 0.7 miles S.
- 9,689residents (2020 Census)
- 3 ftelevation · 1 m
- 8.4 sq miland area · 21.9 km²
- 1,147 / sq mipopulation density
- 33051ZIP code
About Marathon
Marathon is a city in the middle of the Florida Keys, in Monroe County, Florida, United States. As of 2024, the city had a population of 9,914, up from 8,297 in 2010.
Text: Wikipedia · CC BY-SA 4.0
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Live webcams in Marathon
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Living in Marathon
- Median household income
- $89,355
- Median home value
- $725,800
- Median rent
- $1,633/mo
- Median age
- 45.6
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Map of Marathon
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Open in Google Maps ›Marathon, FL population
Marathon had 9,689 residents in the 2020 Census.
| 2020 Census | 9,689 |
|---|---|
| Density | 1,147 per sq mi (443 per km²) |
Source: U.S. Census Bureau, Decennial Census.
Marathon at a glance
| State | Florida (FL) |
|---|---|
| County | Monroe County |
| Type | City |
| Population | 9,689 (2020) |
| Land area | 8.45 sq mi (21.9 km²) |
| Water area | 0.83 sq mi (2.16 km²) |
| Elevation | 3 ft (1 m) |
| Coordinates | 24.7323° N, 81.0251° W |
| ZIP code | 33051 |
| Official website | ci.marathon.fl.us |
| Census code (GEOID) | 1243000 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near Marathon
- Key Colony Beach0.7 mi S
- Duck Key7.8 mi E
- Layton14.7 mi NE
- Big Pine Key21.4 mi W
- Cudjoe Key30.0 mi W
- Islamorada, Village of Islands35.1 mi NE
- Big Coppitt Key40.8 mi W
- Stock Island46.4 mi W
- Key West48.5 mi W
Straight-line distance between town centers.
Frequently asked questions about Marathon
What county is Marathon in?
Marathon is in Monroe County, Florida.
What is the population of Marathon, FL?
9,689 people lived in Marathon at the 2020 Census.
What is the ZIP code of Marathon, FL?
The ZIP code of Marathon is 33051.
What is the elevation of Marathon?
3 feet (1 m) above sea level.
What towns are near Marathon?
Key Colony Beach (0.7 mi), Duck Key (7.8 mi), Layton (14.7 mi), Big Pine Key (21.4 mi), Cudjoe Key (30.0 mi).
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