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, hunting land and other land for sale in Madison County recently was almost $86 million, representing a total of 4,752 acres of land for sale in Madison County. Madison County ranks 135th in the Lone Star State for the combined amount of land currently advertised for sale. There were two properties listed as sold in Madison County through the Land Network Comparable Sales Program. This represented a total value of $2,121,665. Of all locations in Madison County with ranches, farms, hunting land and other rural land and acreage for sale, Madisonville featured the most land for sale. From an economic perspective, government and state-level services contribute most to Madison County's overall GDP. Madison County is Texas's 242nd biggest county (472 square miles). It's located in the Brazos Texas region of Texas.