Petersville, IndianaPetersville is an unincorporated community in Clay Township, Bartholomew County, in the U.S. state of Indiana.HistoryA post office was established at Petersville in 1873, and remained in operation until it was discontinued in 1900. The community was named for its founder, Peter T. Blessing.DemographicsThe United States Census Bureau designated Petersville as a census designated place in the 2022 American Community Survey.