Marathon, Florida is an incorporated city in Monroe County located in the Middle Keys, serving as a central hub between Key Largo and Key West. It spans approximately 9.3 square miles across 13 islands, including Vaca Key, Boot Key, and Grassy Key, with city boundaries extending from the east end of the Seven Mile Bridge (Mile Marker 47) to the west end of Tom’s Harbor Bridge (Mile Marker 60).

As of 2026, the city has a population of approximately 10,139, growing at a rate of 0.79% annually. The area is known for its tropical savanna climate, rich maritime history derived from the Florida East Coast Railroad construction, and its status as a major destination for sport fishing, snorkeling, and diving. Notable landmarks include the Turtle Hospital, Crane Point Museum & Nature Center, and the Seven Mile Bridge.

Luxury Housing Market Facts:

Marathon, Florida's luxury housing market shows characteristics of both the broader Florida luxury surge and its unique Keys location. Here are the key facts:

Marathon's median home price is $990,000 according to Movoto, which is 191% higher than the national average. Recent data shows a market adjustment with prices declining 10.3% year-over-year to $843,000 as of March 2026. The average price per square foot in Marathon is approximately $826.

The Florida luxury market overall has been performing strongly in 2026. Statewide, sales in the $3-5 million range surged nearly 69%, while the $1.5-2 million category rose 61% compared to early 2025. Single-family homes priced between $5-10 million jumped more than 31% during the same period.

Florida's luxury market has been accelerating despite elevated mortgage rates and broader affordability pressures, with wealthy buyers, retirees, investors, and business owners continuing to purchase high-end properties throughout the state