Frankfort is located in Clinton county Indiana with a geographic area of 8.1 square miles. The total population in Frankfort is 15,569 with 49.1% male and 50.9% female. Children under age 5 represent 6.5% of the population, under age 18 equal 27.1% of the population and over age 65 is 15.0% of the population. The median household income is $42,448, per capita income is $21,325. There are a total of 6,029 housing units with 56.8% owner occupied. Education includes 45.2% of residents that are high school graduates and 11.5% with a bachelor's degree or higher. The average temperature in Frankfort in the summer is 72 degrees, and in the winter 29 degrees.