Preble, IndianaPreble is an unincorporated community in Preble Township, Adams County, in the U.S. state of Indiana. It is approximately 4 miles west of Decatur, Indiana.HistoryA post office was established in Preble in 1883. The community was named after Preble Township.SitesPreble currently includes a post office, a volunteer fire department, a granary, and an outdoor arena.DemographicsThe United States Census Bureau defined Preble as a census designated place in the 2022 American Community Survey.