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Key Largo, Florida facts for kids

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Key Largo, Florida
Location in Monroe County and the state of Florida
Location in Monroe County and the state of Florida
U.S. Census Bureau map showing CDP boundaries
U.S. Census Bureau map showing CDP boundaries
Country  United States
State  Florida
County  Monroe
 • Total 15.25 sq mi (39.49 km2)
 • Land 12.05 sq mi (31.21 km2)
 • Water 3.19 sq mi (8.27 km2)
7 ft (2 m)
 • Total 12,447
 • Density 1,032.86/sq mi (398.79/km2)
Time zone UTC-5 (Eastern (EST))
 • Summer (DST) UTC-4 (EDT)
ZIP code
Area code(s) 305
FIPS code 12-36375
GNIS feature ID 0294458
Key Largo harbor

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 12,447 at the 2020 census. The name comes from the Spanish Cayo Largo, or "long key". It is both the first island and town of the Florida Keys to be reached from the Overseas Highway to Key West. It was also the location of one of the stations of the Overseas Railroad.


Key Largo is located at 25°6′24″N 80°25′48″W / 25.10667°N 80.43000°W / 25.10667; -80.43000 (25.106637, -80.429917).

According to the United States Census Bureau, the CDP has a total area of 39.6 km² (15.3 mi²), of which 31.5 km² (12.2 mi²) is land and 8.1 km² (3.1 mi²) 20.54% is water.

A southeast-pointing cape on the north end of El Radabob Key, 24°9′12″N 80°21′30″W / 24.15333°N 80.35833°W / 24.15333; -80.35833, 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(located at Mile Marker 102). The park is primarily offshore and stretches three miles into the Atlantic Ocean and is 25 miles long. Adjacent to this is the Florida Keys National Marine Sanctuary covering 178 square nautical miles. Both areas were designed to protect marine life, including the extensive coral reefs in the area.


Historical population
Census Pop.
1970 2,866
1980 7,447 159.8%
1990 11,336 52.2%
2000 12,971 14.4%
2010 10,433 −19.6%
2020 12,447 19.3%

2020 census

Key Largo racial composition
Race Number Percentage
White (non-Hispanic) 8,012 64.37%
Black or African American (non-Hispanic) 213 1.71%
Native American 19 0.15%
Asian 115 0.92%
Pacific Islander 8 0.06%
Other/Mixed 397 3.19%
Hispanic or Latino 3,683 29.59%

As of the 2020 United States census, there were 12,447 people, 4,326 households, and 2,692 families residing in the CDP. The population density was 377.7/km2 (978.1/mi2). There were 8,043 housing units at an average density of 255.6/km2 (661.9/mi2). There were 4,326 households, out of which 23.7% had children under the age of 18 living with them, 50.5% were married couples living 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.

In popular culture

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.


The Monroe County School District operates the Key Largo School.

The Roman Catholic Archdiocese of Miami formerly operated the Saint Justin Martyr, Academy of Marine Science (PK-9) school in Key Largo.

Notable people

  • Dick Rutkowski, Founder of IANTD
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