The Town[3] of Thornapple is located in Rusk County, Wisconsin, United States.

As of the census[2] of 2000, there were 811 people, 312 households, and 237 families residing in the town.

There were 375 housing units at an average density of 7.3 per square mile (2.8/km2).

There were 312 households, out of which 31.4% had children under the age of 18 living with them, 66.0% were married couples living together, 4.8% had a female householder with no husband present, and 24.0% were non-families.

19.6% of all households were made up of individuals, and 8.3% had someone living alone who was 65 years of age or older.