Key Largo is located at . According to the United States Census Bureau, the CDP has a total area of 39.6 km2, of which 31.5 km2 is land and 8.1 km2 20.54% is water. A southeast-pointing cape on the north end of El Radabob Key,, just south of Rattlesnake Key, is the east endpoint of the longest distance between any two points of land within the fifty states of the United States, as measured via Google Earth. The other endpoint is at the tip of a spit of sand on Green Island, Hawaii, 5,857.46 miles away. Key Largo is also the location of the first undersea park in the United States, established in 1963, and called the John Pennekamp Coral Reef State Park. The park is primarily offshore and stretches three miles into the Atlantic Ocean and is 25 miles long. Adjacent to this is the covering 178 square nautical miles. Both areas were designed to protect marine life, including the extensive coral reefs in the area.
Demographics
According to the census of 2000, there were 12,971 people, 5,245 households, and 3,288 families residing in the CDP. The population density was 377.7/km2. There were 8,043 housing units at an average density of 255.6/km2. The racial makeup of the CDP was 94.38% White, 2.04% African American, 0.29% Native American, 0.47% Asian, 0.95% from other races, and 1.86% from two or more races. Hispanic or Latino of any race were 16.65% of the population. There were 5,245 households, out of which 23.7% had children under the age of 18 living with them, 50.5% were married couplesliving together, 7.4% had a female householder with no husband present, and 37.3% were non-families. 27.6% of all households were made up of individuals, and 8.8% had someone living alone who was 65 years of age or older. The average household size was 2.26 and the average family size was 2.75. In the CDP, the population was spread out, with 19.7% under the age of 18, 5.6% from 18 to 24, 28.7% from 25 to 44, 30.3% from 45 to 64, and 15.8% who were 65 years of age or older. The median age was 43 years. For every 100 females, there were 107.8 males. For every 100 females age 18 and over, there were 107.6 males. The average income for a household in the CDP was $42,577, and the median income for a family was $50,755. Males had a median income of $33,588 versus $25,468 for females. The per capita income for the CDP was $25,441. About 5.9% of families and 8.3% of the population were below the poverty line, including 8.7% of those under age 18 and 7.8% of those age 65 or over.
The 1948 film Key Largo, starring Edward G. Robinson, Lauren Bacall, and Humphrey Bogart, was set there. The 1981 hit single "Key Largo" by Bertie Higgins was inspired by the film, not the namesake city. Conversely, the 1984 single "Smooth Operator" by Sade references the city, rather than the film.
