NULL Of 254 counties in the state, Clay County is 51st in terms of its size (1,116 square miles). Clay County is in North Central Plains Texas. Texas's Clay County includes about 2,000 acres of riverfront homes and property for sale based on recent Land Network data. The combined market value of ranches, farms, hunting land and other rural land and acreage for sale here was around $10 million. Browse all waterfront property for sale in Clay 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 Clay County is ranches.