Fond du lac is located in Fond du lac county Wisconsin with a geographic area of 19.2 square miles. The total population in Fond du lac is 42,944 with 48.3% male and 51.7% female. Children under age 5 represent 6.3% of the population, under age 18 equal 22.6% of the population and over age 65 is 16.3% of the population. The median household income is $54,587, per capita income is $28,555. There are a total of 17,479 housing units with 58.1% owner occupied. Education includes 31.3% of residents that are high school graduates and 23.2% with a bachelor's degree or higher. The average temperature in Fond du lac in the summer is 69 degrees, and in the winter 17 degrees.