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. There was a combined almost $82 million of farms, ranches, hunting land and other land for sale in Madison County, Texas, recently on Land.com. The total size of all Madison County ranches, farms, hunting land and other rural land and acreage for sale was around 5,000 acres. Madison County ranks 135th in Texas for the total acreage of land currently advertised for sale. 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 largest county (472 square miles). It's located in the Brazos Texas region of the state.