Knox County is in North Central Plains Texas. Of the 254 counties in the state, 547,507-acre Knox County ranks 193rd by size. Recent listings of residential land for sale in Texas's Knox County totals roughly 1,000 acres and a combined market value of approximately $1 million. The most common type of land for sale by combined acreage in Knox County is farms. The average price of residential acreage for sale in Knox County was $130,632. Browse all residential land and rural property for sale in Texas to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.