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 land for sale in San Saba County recently on Land.com was almost $254 million. This represents nearly 100,000 acres of farms and ranches for sale in San Saba County. San Saba County ranks 135th in the state for the total acreage of land currently advertised for sale. Of all locations in San Saba County with farms, ranches, hunting land and other land for sale, San Saba featured 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 largest county (1,138 square miles). It's located in the Hill Country North Texas region of the state.