Hill County is in Blacklands North Texas. Of the 254 counties in the Lone Star State, Hill County ranks 85th in terms of size (630,852 acres). The most common type of land for sale by combined acreage in Hill County is undeveloped land. Browse all Hill County forest and timberland for sale on the Land Network to find the right timberland acreage for your commercial or individual investment needs. 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.