Of 53 counties in the state, Mercer County is 35th in terms of its size (1,112 square miles). Mercer County is in Central North Dakota. Recent Land Network data records 1,000 acres of ranches for sale in North Dakota's Mercer County, which is valued at a combined $7 million. Browse all Mercer 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 Mercer County is residential property.