Sullivan is a city in Hamilton Township, Sullivan County, Indiana, United States. The population was 4,249 at the 2010 census. It is part of the Terre Haute Metropolitan Statistical Area. The city is the county seat of Sullivan County.
Downtown Sullivan
Sullivan County Courthouse is listed on the National Register of Historic Places
Hamilton Township, Sullivan County, Indiana
Hamilton Township is one of nine townships in Sullivan County, Indiana, United States. As of the 2020 census, its population was 7,143 and it contained 3,404 housing units.
Sullivan County Poor Home, east of the city of Sullivan