The value of all land and rural real estate for sale in Mercer County recently was nearly $6 million, representing a combined 658 acres of land for sale in Mercer County. Mercer County ranks eighth out of 53 counties in the Sioux State for the total acreage of land currently advertised for sale. Among cities in Mercer County with land and rural real estate for sale, Hazen featured the most land for sale. Economically speaking, Mercer County's is largely dependent on mining and mineral extraction-related businesses and services. Mercer County is the 35th biggest county (1,112 square miles) in North Dakota. It's located in the Central North Dakota region of the state.