Land for sale in McKenzie County recently totaled around $6 million and around 1,000 acres. McKenzie County ranks 12th in the Peace Garden State for the total acreage of land currently advertised for sale. Of all locations in McKenzie County with land for sale, Watford City had the most land for sale. Mining and mineral extraction-related services are the main economic drivers in this part of North Dakota. McKenzie County is the largest county in North Dakota (2,860 square miles). It's located in the West North Dakota region of North Dakota.