NULL Of 254 counties in the Lone Star State, Zapata County ranks 69th in terms of size (1,058 square miles). Zapata County is in Rio Grande Plains Texas. There is almost 1,000 acres of farms for sale in Texas's Zapata County based on recent Land Network data. The combined market value of farms, ranches, hunting land and other land for sale here is around $400,000. Browse all Zapata County 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 individual needs. The most common type of land for sale by combined acreage in Zapata County is ranches.