The central region of Texas covers the state's three largest cities: Houston, Dallas-Fort Worth and San Antonio. The limestone terrain of Texas Hill Country lies in Central Texas, as do the state's three largest rivers, the Trinity, the Brazos and the Colorado. A total of almost 100,000 acres were listed for sale in Robertson County, Texas, recently, representing a combined nearly $161 million in Robertson County ranches, farms, hunting land and other rural land and acreage for sale. Robertson County ranks 117th out of 254 counties in the Lone Star State for the total number of acres of land currently advertised for sale. There were two properties listed as sold in Robertson County through the Land Network Comparable Sales Program. This represented a total value of $1,260,000. Among cities in Robertson County with farms, ranches, hunting land and other land for sale, Franklin had the most land for sale. Mining and mineral extraction-related services are the main economic drivers in this part of Texas. Robertson County is Texas's 188th biggest county (865 square miles). It's located in the Brazos Texas region of Texas.