Of 53 counties in the Rough Rider State, Oliver County ranks 49th in terms of size (731 square miles). Oliver County is in Central North Dakota. There is almost 3,000 acres of ranches for sale in Oliver County, North Dakota, based on recent Land Network data. The combined market value of farms and ranches for sale here is approximately $5 million. Browse all Oliver County ranches for sale on the Land Network to find the ranch that's right for your business or commercial needs, from the sprawling legacy ranch to unbelievable residential ranch for your second home, investment property or retirement nest egg. The most common type of land for sale by combined acreage in Oliver County is house.