NULL Of 254 counties in the state, Gaines County ranks 22nd by size (1,502 square miles). Gaines County is in South Plains Texas. There is roughly 1,000 acres of recreational land for sale in Gaines County, Texas, based on recent Land Network data. The combined market value of land and rural real estate for sale here is $2 million. Browse all recreational property for sale in Gaines 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 Gaines County is house.