Of 53 counties in the Sioux State, Mercer County is 35th in terms of its size (1,112 square miles). Mercer County is in Central North Dakota. The total value of roughly 1,000 acres of lakefront land and property recently listed for sale in North Dakota's Mercer County was nearly $2 million. Browse all waterfront property for sale in Mercer County on the Land Network to find the marina, lakefront and other recreational property that meets your needs, from waterside land perfect as a retirement investment to existing residential waterfront land and property for hunting, fishing and other outdoor-recreation pursuits! The most common type of land for sale by combined acreage in Mercer County is house.