The value of farmsand rural real estate for sale in Indiana's Carroll County recently on Land.com was $18 million. This represents approximately 1,000 acres of land for sale in Carroll County. Carroll County ranks 85th in the state for the total acreage of land currently advertised for sale. Delphi had the most land for sale. From an economic perspective, manufacturing and related services are the main sectors in Carroll County. Carroll County is the 63rd biggest county (375 square miles) in Indiana. It's located in the West Indiana region of the state.