Seneca is a town in Green Lake County, Wisconsin, United States.

As of the census[2] of 2000, there were 424 people, 165 households, and 120 families residing in the town.

There were 194 housing units at an average density of 5.9 per square mile (2.3/km2).

There were 165 households, out of which 29.7% had children under the age of 18 living with them, 66.7% were married couples living together, 3.6% had a female householder with no husband present, and 26.7% were non-families.

23.0% of all households were made up of individuals, and 11.5% had someone living alone who was 65 years of age or older.