Duval County is in Rio Grande Plains Texas. Of the 254 counties in the Lone Star State, Duval County ranks 14th in terms of size (1 million acres). The total value of almost 2,000 acres of farms recently listed for sale in Duval County, Texas, was approximately $7 million. The average price of farmland for sale in Duval County was $394,918. Farms for sale in Duval County feature livestock including cattle, horses, goats, sheep and pig. Browse all Texas farms for sale on the Land Network to find the farm, cattle operation, hobby farm or other farm property that's right for your future business or individual needs.