Cassville is a town in Grant County, Wisconsin, United States.
As of the[update] census[1] of 2000, there were 487 people, 185 households, and 135 families living in the town.
There were 220 housing units at an average density of 6.6 per square mile (2.5/km2).
The racial makeup of the town was 99.59% White, 0.21% Black or African American, and 0.21% from two or more races.
Of the 185 households 35.7% had children under the age of 18 living with them, 63.2% were married couples living together, 5.4% had a female householder with no husband present, and 27.0% were non-families.