Janesville is located in Rock county Wisconsin with a geographic area of 34.2 square miles. The total population in Janesville is 64,415 with 48.5% male and 51.5% female. Children under age 5 represent 5.4% of the population, under age 18 equal 23.0% of the population and over age 65 is 17.0% of the population. The median household income is $55,914, per capita income is $30,041. There are a total of 27,302 housing units with 65.5% owner occupied. Education includes 29.7% of residents that are high school graduates and 26.4% with a bachelor's degree or higher. The average temperature in Janesville in the summer is 70 degrees, and in the winter 17 degrees.
