Duval County is in Rio Grande Plains Texas. Of the 254 counties in the Lone Star State, 1,795-square-mile Duval County ranks 14th by size. Recent Land Network data includes 2,000 acres of farms for sale in Texas's Duval County, which is valued at a combined $10 million. The average price of farms for sale in Duval County was $537,394. Farms for sale in Duval County hold 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 commercial or lifestyle needs.