Cassville is located in Grant county Wisconsin with a geographic area of 1.0 square miles. The total population in Cassville is 832 with 44.1% male and 55.9% female. Children under age 5 represent 5.2% of the population, under age 18 equal 15.4% of the population and over age 65 is 29.8% of the population. The median household income is $46,458, per capita income is $25,580. There are a total of 407 housing units with 71.5% owner occupied. Education includes 34.6% of residents that are high school graduates and 11.5% with a bachelor's degree or higher. The average temperature in Cassville in the summer is 66 degrees, and in the winter 17 degrees.