A total of nearly 2,000 acres were listed for sale in Harford County recently, representing a total value of nearly $90 million in Harford County farms and rural land for sale. Harford County ranks 11th out of 24 counties in the Terrapin State for the total number of acres of land currently advertised for sale. Among cities 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 largest counties in Maryland (526 square miles). It's located in the Central Maryland region of Maryland.