The total value of land and rural real estate for sale in North Dakota's Oliver County recently on Land.com was nearly $6 million. This represents approximately 3,000 acres of farms, ranches, hunting land and other land for sale in Oliver County. Oliver County ranks 23rd out of 53 counties in the Rough Rider State for the combined amount of land currently advertised for sale. Center featured the most land for sale. Oliver County has a large agricultural economy, with 290 farms recorded in the county during the latest U.S. Census. Farming activities in Oliver County generate annual revenues of $3 million, most of which is from crops. Oliver County is North Dakota's 49th biggest county (731 square miles). It's located in the Central North Dakota region of North Dakota.