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 almost 100,000 acres were listed for sale in Washington County recently; the value of all Washington County land and rural real estate for sale was almost $489 million. Washington County ranks 47th in the Lone Star State for the combined amount of land currently advertised for sale. There were four properties listed as sold in Washington County through the Land Network Comparable Sales Program. This represented a total value of $19,303,809. Of all ranches, farms, hunting land and other rural land and acreage for sale in Washington County, Brenham had the most land for sale. Manufacturing and related services are the largest economic sectors in Washington County. Washington County is Texas's 233rd biggest county (621 square miles). It's located in the Brazos Texas region of Texas.