South Texas is typically classified as the area between the San Antonio metro area and south to the Rio Grande and Gulf of Mexico. A combined almost 8,000 acres were listed for sale in Texas's Starr County recently; the overall value of all Starr County farms and ranches for sale was around $91 million. Starr County ranks 171st in the Lone Star State for the combined amount of land currently advertised for sale. Rio Grande City had the most land for sale. Starr County is the 41st largest county (1,229 square miles) in Texas. It's located in the Rio Grande Plains Texas region of Texas.