Land for sale in Carroll County recently totaled almost $18 million and almost 1,000 acres. Carroll County ranks 84th in the Hospitality State for the total acreage of land currently advertised for sale. Delphi featured the most land for sale. From an economic perspective, manufacturing and related services are the main sectors in Carroll County. Carroll County is Indiana's 63rd biggest county (375 square miles). It's located in the West Indiana region of the state.