Key largo is located in Monroe county Florida with a geographic area of 12.1 square miles. The total population in Key largo is 9,670 with 48.3% male and 51.7% female. Children under age 5 represent 2.7% of the population, under age 18 equal 12.9% of the population and over age 65 is 28.4% of the population. The median household income is $66,199, per capita income is $46,241. There are a total of 4,355 housing units with 73.3% owner occupied. Education includes 23.9% of residents that are high school graduates and 34.3% with a bachelor's degree or higher. The average temperature in Key largo in the summer is 80 degrees, and in the winter 56 degrees.