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 approximately 100,000 acres were listed for sale in Robertson County, Texas, recently, representing a total value of approximately $147 million in Robertson County land for sale. Robertson County ranks 114th out of 254 counties in the state for the total number of acres of land currently advertised for sale. Among cities in Robertson County with land for sale, Franklin featured the most land for sale. Economically speaking, Robertson County's is largely dependent on mining and mineral extraction-related businesses and services. Robertson County is Texas's 188th largest county (865 square miles). It's located in the Brazos Texas region of Texas.