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 total of 100,000 acres were listed for sale in Texas's Duval County recently; the combined value of all Duval County land and rural real estate for sale was $63 million. Duval County ranks 154th out of 254 counties in the Lone Star State for the combined amount of land currently advertised for sale. There were seven properties listed as sold in Duval County through the Land Network Comparable Sales Program. This represented a total value of $3,592,903. Of all locations in Duval County with ranches, farms, hunting land and other rural land and acreage for sale, San Diego had the most land for sale. Mining and mineral extraction-related services are the main economic drivers in this part of Texas. Duval County is the 14th biggest county (1,795 square miles) in Texas. It's located in the Rio Grande Plains Texas region of the state.