There was a total of approximately $149 million of land and rural real estate for sale in Maryland's Carroll County recently on Land.com. The total size of all Carroll County farms, hunting land and other rural land and acreage for sale was almost 2,000 acres. Carroll County ranks fifth in the Free State for the total acreage of land currently advertised for sale. Westminster featured the most land for sale. Carroll County is the 16th biggest county (452 square miles) in Maryland. It's located in the Central Maryland region of the state.