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. Land for sale in Limestone County recently totaled approximately $158 million and 100,000 acres. Limestone County ranks 80th in the state for the total number of acres of land currently advertised for sale. There were two properties listed as sold in Limestone County through the Land Network Comparable Sales Program. This represented a total value of $449,000. Of all farms, ranches, and rural real estate for sale in Limestone County, Groesbeck featured the most land for sale. Government and state-level services are the main economic drivers in Limestone County. Limestone County is the 108th largest county (933 square miles) in Texas. It's located in the Blacklands North Texas region of the state.