Browse all hospitality property for sale in Waller County on Land And Farm to find your next land purchase. The most common type of land for sale by combined acreage in Waller County is residential land. Of the 254 counties in the Lone Star State, Waller County is 237th in terms of its size (513 square miles). Waller County stretches across 518 square miles of Texas terrain and features a population of 48,656. Originally founded in 1873 and named after Edwin Waller, a signer of the Texas Declaration of Independence and the first mayor of Austin. Waller County features an abundance of recreation and historic sites. For example, Stephen F. Austin State Park provides 662 square acres of rich forest to camp, bike, hike, and lodge. The countyâ€™s museums and other outdoor space ensure that residents always have new terrain to explore.