Eustis is located in Lake county Florida with a geographic area of 10.9 square miles. The total population in Eustis is 21,010 with 48.1% male and 51.9% female. Children under age 5 represent 6.0% of the population, under age 18 equal 20.7% of the population and over age 65 is 21.0% of the population. The median household income is $52,074, per capita income is $26,974. There are a total of 8,106 housing units with 63.6% owner occupied. Education includes 35.0% of residents that are high school graduates and 23.7% with a bachelor's degree or higher. The average temperature in Eustis in the summer is 81 degrees, and in the winter 56 degrees.