Alpharetta is located in Fulton county Georgia with a geographic area of 26.9 square miles. The total population in Alpharetta is 66,566 with 50.0% male and 50.0% female. Children under age 5 represent 5.6% of the population, under age 18 equal 25.7% of the population and over age 65 is 10.1% of the population. The median household income is $119,568, per capita income is $60,833. There are a total of 23,958 housing units with 67.7% owner occupied. Education includes 6.6% of residents that are high school graduates and 74.7% with a bachelor's degree or higher. The average temperature in Alpharetta in the summer is 76 degrees, and in the winter 42 degrees.