About This Place
Key Largo is a census-designated place in Monroe County, Florida, United States, located on the island of Key Largo in the upper Florida Keys. The population was 11,886 at the 2000 census. The name comes from the Spanish Cayo Largo, or "long key". It is the first island of the Florida Keys and the originating point of the Overseas Highway to Key West.
Key Largo is located at 25°6′24″N 80°25′48″W / 25.10667°N 80.43°W / 25.10667; -80.43 (25.106637, -80.429917).
According to the United States Census Bureau, the CDP has a total area of 39.6 km² (15.3 mi²). 31.5 km² (12.1 mi²) of it is land and 8.1 km² (3.1 mi²) of it 20.54% is water.