Stock island is located in Monroe county Florida with a geographic area of 0.8 square miles. The total population in Stock island is 4,692 with 50.7% male and 49.3% female. Children under age 5 represent 8.8% of the population, under age 18 equal 23.8% of the population and over age 65 is 11.2% of the population. The median household income is $54,257, per capita income is $28,585. There are a total of 1,806 housing units with 28.1% owner occupied. Education includes 44.5% of residents that are high school graduates and 10.9% with a bachelor's degree or higher. The average temperature in Stock island in the summer is 80 degrees, and in the winter 56 degrees.