Key west is located in Monroe county Florida with a geographic area of 5.6 square miles. The total population in Key west is 24,495 with 53.5% male and 46.5% female. Children under age 5 represent 3.9% of the population, under age 18 equal 14.4% of the population and over age 65 is 17.9% of the population. The median household income is $73,029, per capita income is $47,423. There are a total of 10,788 housing units with 41.8% owner occupied. Education includes 24.6% of residents that are high school graduates and 39.9% with a bachelor's degree or higher. The average temperature in Key west in the summer is 84 degrees, and in the winter 56 degrees.