NULL Of 254 counties in the Lone Star State, Callahan County is 164th in terms of its size (901 square miles). Callahan County is in Crosstimbers Texas. There is about 1,000 acres of lakefront property for sale in Texas's Callahan County based on recent Land Network data. The combined market value of farms and ranches for sale here is about $50 million. Browse all waterfront property for sale in Callahan 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 Callahan County is undeveloped land.