Land for sale in McKenzie County, North Dakota, recently totaled approximately $4 million and nearly 1,000 acres. McKenzie County ranks 11th out of 53 counties in North Dakota for the total number of acres of land currently advertised for sale. Watford City had the most land for sale. Economically speaking, McKenzie County's is largely dependent on mining and mineral extraction-related businesses and services. 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.