Willacy County is in Lower Rio Grande Valley Texas. Of the 254 counties in the Lone Star State, Willacy County is 209th in terms of its size (784 square miles). Willacy County, Texas, includes around 1,000 acres of residential land for sale based on recent Land Network data. The combined market value of ranches, farms, hunting land and other rural land and acreage for sale here was nearly $5 million. The average price of residential acreage for sale in Willacy County was $302,882. 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.