South Texas is typically classified as the area between the San Antonio metro area and south to the Rio Grande and Gulf of Mexico. There was a combined $101 million of ranches, farms, hunting land and other rural land and acreage for sale in Texas's Starr County recently on Land.com. The total of all Starr County farms and ranches for sale was approximately 8,000 acres. Starr County ranks 166th in Texas for the total acreage of land currently advertised for sale. Rio Grande City featured the most land for sale. Starr County is Texas's 41st largest county (1,229 square miles). It's located in the Rio Grande Plains Texas region of Texas.