The value of all land for sale in Harford County recently was approximately $92 million, representing a combined 1,026 acres of land for sale in Harford County. Harford County ranks 11th in the Free State for the total number of acres of land currently advertised for sale. Of all locations in Harford County with farms, hunting land and other rural land and acreage for sale, Aberdeen had the most land for sale. From an economic perspective, government and state-level services contribute most to Harford County's overall GDP. Harford County is one of the ten biggest counties in Maryland (526 square miles). It's located in the Central Maryland region of Maryland.