Decatur County is a county located in the U.S. state of Indiana. As of 2010, the population was 25,740. The county seat is Greensburg.HistoryDecatur County was formed in 1822. It was named for Commodore Stephen Decatur, Jr., naval officer in the First and Second Barbary Wars, and in the War of 1812. Decatur was mortally wounded in a duel in 1820. Greensburg, the county seat, was selected as the location of the Honda assembly plant.GeographyAccording to the 2010 census, the county has a total area of, of which is land and is water.CityGreensburgTownsMillhousenNew PointSt. PaulWestportCensus-designated placesClarksburgLake SanteeOther unincorporated placesMilfordTownshipsAdamsClayClintonFugitJacksonMarionSalt CreekSand CreekWashington
