Watterstown is a town in Grant County, Wisconsin, United States.

At the 2000 census there were 362 people, 134 households, and 99 families living in the town.

There were 171 housing units at an average density of 6.2 per square mile (2.4/km2).

The racial makeup of the town was 96.13% White, 0.28% Native American, 3.31% Asian, and 0.28% from two or more races.

[2] Of the 134 households 35.8% had children under the age of 18 living with them, 61.9% were married couples living together, 4.5% had a female householder with no husband present, and 25.4% were non-families.