Grafton is located in Ozaukee county Wisconsin with a geographic area of 5.1 square miles. The total population in Grafton is 11,718 with 48.1% male and 51.9% female. Children under age 5 represent 5.4% of the population, under age 18 equal 20.4% of the population and over age 65 is 20.0% of the population. The median household income is $74,918, per capita income is $40,258. There are a total of 5,319 housing units with 67.2% owner occupied. Education includes 16.7% of residents that are high school graduates and 45.3% with a bachelor's degree or higher. The average temperature in Grafton in the summer is 66 degrees, and in the winter 17 degrees.
