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 farms, ranches, and rural real estate for sale in Texas's Limestone County recently was approximately $164 million, representing a combined 11,810 acres of land for sale in Limestone County. Limestone County ranks 88th in the Lone Star State for the combined amount of land currently advertised for sale. There were three properties listed as sold in Limestone County through the Land Network Comparable Sales Program. This represented a total value of $1,584,000. Among cities in Limestone County with farms, ranches, hunting land and other 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.