The value of all land for sale in Foster County recently was approximately $400,000, representing a total of 152 acres of land for sale in Foster County. Foster County ranks 39th in the Rough Rider State for the total number of acres of land currently advertised for sale. Among cities in Foster County with ranches, farms, hunting land and other rural land and acreage for sale, Melville featured the most land for sale. Its economy is defined as agricultural, with 310 farms recorded in the county during the most recent U.S. Census. Farming activities in Foster County generate annual revenues of $6 million, most of which is from crops. Foster County is the 52nd largest county (646 square miles) in North Dakota. It's located in the Southeast North Dakota region of North Dakota.