The value of all farms, ranches, hunting land and other land for sale in Foster County recently was $500,000, representing a combined two acres of land for sale in Foster County. Foster County ranks 26th in the Peace Garden State for the total acreage of land currently advertised for sale. Of all land and rural real estate for sale in Foster County, Carrington had 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 biggest county (646 square miles) in North Dakota. It's located in the Southeast North Dakota region of North Dakota.