A total of 2,000 acres were listed for sale in Maine's Knox County recently, representing a total value of $155 million in Knox County farms and rural land for sale. Knox County ranks 13th out of 16 counties in Maine for the total number of acres of land currently advertised for sale. Rockport featured the most land for sale. Based on its natural assets, tourism and recreation contribute significant revenue toward Knox County's overall GDP. Knox County is one of the ten biggest counties in Maine (1,143 square miles). It's located in the Southwest Maine region of Maine.