Dellona is a town in Sauk County, Wisconsin, United States.

At the 2000 census,[2] there were 1,199 people, 422 households and 335 families residing in the town.

There were 498 housing units at an average density of 14.2 per square mile (5.5/km2).

There were 422 households, of which 35.1% had children under the age of 18 living with them, 68.7% were married couples living together, 6.2% had a female householder with no husband present, and 20.6% were non-families.

13.5% of all households were made up of individuals, and 4.0% had someone living alone who was 65 years of age or older.