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. A total of 100,000 acres were listed for sale in Mills County, Texas, recently, representing a combined around $170 million in Mills County ranches, farms, hunting land and other rural land and acreage for sale. Mills County ranks 136th out of 254 counties in the Lone Star State for the total acreage of land currently advertised for sale. There were three properties listed as sold in Mills County through the Land Network Comparable Sales Program. This represented a total value of $805,400. Among cities in Mills County with land and rural real estate for sale, Goldthwaite had the most land for sale. Agriculture and farming drives the Mills County economy, with 870 farms recorded in the county during the U.S. Census in 2012. Farming activities in Mills County generate annual revenues of $4 million, the majority of which comes from livestock products. Mills County is the 213th biggest county (749 square miles) in Texas. It's located in the Hill Country North Texas region of the state.