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. Land for sale in Texas's Hamilton County recently totaled almost $236 million and nearly 100,000 acres. Hamilton County ranks 80th in the state for the combined amount of land currently advertised for sale. Of all locations in Hamilton County with land for sale, Hamilton had the most land for sale. Hamilton County has a large agricultural economy, with 1,001 farms recorded in the county during the latest U.S. Census. Farming activities in Hamilton County generate annual revenues of $1 million, the majority of which comes from livestock products. Hamilton County is Texas's 195th biggest county (836 square miles). It's located in the Hill Country North Texas region of the state.