Marathon is a city located in Monroe County, in the state of Florida (FL), United States. Nestled in the South Atlantic division of the South region, it covers an area of 8.7 square miles (22.0 km²) and sits at an elevation of 3 ft. With a population of approximately 10,255 residents, Marathon offers a vibrant community life.
The town's population is composed of about 52.52% males and 47.48% females, and it has a population density of 185.55 people per square mile (457.74/km²). Marathon lies at a latitude of 24.73 and a longitude of -81.04, operating in the UTC-5.
Locals reflect a blend of American ancestry, with roots primarily in United States (5.8%), followed by English (12.6%), German (17.1%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 33050.