Dallas County is in Dallas Prairie Texas. Of the 254 counties in the Lone Star State, 908-square-mile Dallas County ranks 147th by size. Recent Land Network data totals around 2,000 acres of residential land and property for sale in Texas's Dallas County, which is valued at a combined $486 million. The average price of residential acreage for sale in Dallas County was $2 million. 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.