NULL Of 254 counties in the Lone Star State, King County is 141st in terms of its size (913 square miles). King County is in Rolling Plains North Texas. King County, Texas, has around 3,000 acres of riverfront property for sale based on recent Land Network data. The combined market value of land and rural real estate for sale here was approximately $4 million. Browse all waterfront property for sale in King 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! By overall acreage, riverfront property is the most common type of land for sale in King County.