| Official Name: | Key Largo, Florida |
| Settlement Type: | Census-designated place |
| Mapsize: | 250x200px |
| Image Map1: | Key_Largo.gif |
| Mapsize1: | 250x200px |
| Map Caption1: | U.S. Census Bureau map showing CDP boundaries |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 39.49 |
| Area Land Km2: | 31.21 |
| Area Water Km2: | 8.27 |
| Area Total Sq Mi: | 15.25 |
| Area Land Sq Mi: | 12.05 |
| Area Water Sq Mi: | 3.19 |
| Population As Of: | 2020 |
| Population Footnotes: | [2] |
| Population Total: | 12447 |
| Population Density Km2: | 398.79 |
| Population Density Sq Mi: | 1032.86 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 25.1067°N -80.43°W |
| Elevation M: | 2 |
| Elevation Ft: | 7 |
| Postal Code Type: | ZIP code |
| Postal Code: | 33037 |
| Area Code: | 305 |
| Blank Name: | FIPS code |
| Blank Info: | 12-36375[3] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0294458[4] |
Key Largo is an unincorporated area and 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,[2] up from 10,433 in 2010.[5] 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 (25.106637, -80.429917).[6] It shares the island of Key Largo with Tavernier to the southwest and North Key Largo to the northeast. U.S. Route 1, the Overseas Highway, runs the length of the community, leading north to Miami and southwest to Key West.
According to the United States Census Bureau, the CDP has a total area of, of which are land and, or 20.96%, are water.[1]
Key Largo is 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 3miles into the Atlantic Ocean and is 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.
According to the Köppen climate classification, Key Largo has a tropical monsoon climate (Am).
| 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% |
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 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.[7]
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 town. Conversely, the 1984 single "Smooth Operator" by Sade references the town, rather than the film. The song "Kokomo" by the Beach Boys also references Key Largo.