Exeter is a town in Green County, Wisconsin, United States.

The unincorporated communities of Dayton and Ross Crossing are located in the town.

According to the United States Census Bureau, the town has a total area of 35.1 square miles (91.0 km2), all of it land.

There were 470 housing units at an average density of 13.4 per square mile (5.2/km2).

11.7% of all households were made up of individuals, and 3.1% had someone living alone who was 65 years of age or older.