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 San Saba County recently, representing a total value of almost $250 million in San Saba County ranches, farms, hunting land and other rural land and acreage for sale. San Saba County ranks 130th out of 254 counties in the Lone Star State for the combined amount of land currently advertised for sale. There were six properties listed as sold in San Saba County through the Land Network Comparable Sales Program. This represented a total value of $7,547,000. Among cities in San Saba County with ranches, farms, hunting land and other rural land and acreage for sale, San Saba had the most land for sale. Agriculture and farming drives the San Saba County economy, with 744 farms recorded in the county during the U.S. Census in 2012. Farming activities in San Saba County generate annual revenues of $4 million, the majority of which comes from livestock products. San Saba County is Texas's 47th biggest county (1,138 square miles). It's located in the Hill Country North Texas region of the state.