NULL Of 254 counties in the Lone Star State, Castro County ranks 169th in terms of size (899 square miles). Castro County is in Panhandle Texas. There is 1,000 acres of recreational land and property for sale in Texas's Castro County based on recent Land Network data. The combined market value of land and rural real estate for sale here is about $100,000. Browse all recreational property for sale in Castro County to find the recreational tract that suits your lifestyle needs, from hunting and fishing properties for the outdoor enthusiast to undeveloped acreage ready for future residential-property development. The most common type of land for sale by combined acreage in Castro County is farms.