There was a combined around $969 million of land for sale in Martin County recently on Land.com. The total size of all Martin County farms and rural land for sale was approximately 3,000 acres. Martin County ranks 35th out of 67 counties in the Orange State for the total number of acres of land currently advertised for sale. Of all locations in Martin County with land and rural real estate for sale, Palm City had the most land for sale. Based on its natural assets, tourism and recreation are important factors in the Martin County economy. Martin County is Florida's 39th biggest county (753 square miles). It's located in the Southeast & The Keys Florida region of Florida.