Seneca is a town in Crawford County, Wisconsin, United States.

As of the census[2] of 2000, there were 893 people, 311 households, and 251 families residing in the town.

There were 479 housing units at an average density of 8.2 per square mile (3.2/km2).

There were 311 households, out of which 37.9% had children under the age of 18 living with them, 71.1% were married couples living together, 5.8% had a female householder with no husband present, and 19.0% were non-families.

15.8% of all households were made up of individuals, and 7.7% had someone living alone who was 65 years of age or older.