Sunset Bay is a charming waterfront neighborhood situated on Grassy Key within the city limits of Marathon, Florida. This area is known for its serene gulfside setting, tropical vegetation, and convenient access to the Florida Keys' signature boating and outdoor lifestyle. Homes in Sunset Bay typically offer proximity to the water, with many properties providing opportunities for private docks or easy marina access nearby.

The community emphasizes a relaxed, nature-focused way of living, surrounded by the unique ecosystems of the Keys. Residents appreciate the quiet streets, palm-lined views, and the ability to enjoy spectacular sunsets over the Gulf. Its location near mile marker 4.5-5 places it conveniently between Key Colony Beach and other Marathon attractions, balancing seclusion with accessibility to shops, restaurants, and services.

Notable for its small-scale, low-density development, Sunset Bay attracts those seeking a peaceful residential enclave away from busier tourist spots. The surrounding environment includes upland hammocks and coastal features that enhance the natural beauty and appeal for outdoor enthusiasts. Proximity to public parks and water access points supports activities like kayaking, fishing, and beachcombing.

Overall, Sunset Bay represents quintessential Florida Keys living—laid-back, scenic, and connected to the water—making it ideal for retirees, boaters, and families who value tranquility and natural surroundings.