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. The value of all ranches, farms, hunting land and other rural land and acreage for sale in Texas's Limestone County recently was $153 million, representing a total of 10,934 acres of land for sale in Limestone County. Limestone County ranks 95th in the Lone Star State for the combined amount of land currently advertised for sale. There were six properties listed as sold in Limestone County through the Land Network Comparable Sales Program. This represented a total value of $2,968,000. Of all locations in Limestone County with land for sale, Mexia had the most land for sale. From an economic perspective, government and state-level services contribute most to Limestone County's overall GDP. Limestone County is the 108th largest county (933 square miles) in Texas. It's located in the Blacklands North Texas region of the state.