Sullivan is a town in Jefferson County, Wisconsin, United States.

[2] The village of Sullivan, the census-designated place of Rome, and the unincorporated communities of Heath Mills, Oak Hill, and Slabtown are located in the town.

As of the census[4] of 2000, there were 2,124 people, 819 households, and 609 families residing in the town.

There were 861 housing units at an average density of 24.8 per square mile (9.6/km2).

19.5% of all households were made up of individuals, and 6.5% had someone living alone who was 65 years of age or older.