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 Texas's Mills County recently was $84 million, representing a total of 18,520 acres of land for sale in Mills County. Mills County ranks 132nd out of 254 counties in the Lone Star State for the total number of acres of land currently advertised for sale. There were seven properties listed as sold in Mills County through the Lands of America Comparable Sales Program. This represented a total value of $7,522,578. Of all locations in Mills County with farms, ranches, 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 Texas.