Browse all hospitality property for sale in Austin County on Land And Farm to find your next land purchase. The most common type of land for sale by combined acreage in Austin County is residential land. Of the 254 counties in Texas, Austin County ranks 224th in terms of size (647 square miles). Sometimes confused with the city of Austin, Austin County expands over an area of 656 square miles. The county, though quaint, offers a host of natural amenities to its 29,563 residents. Stephen F. State Park, for example, features a 6-mile trail fit for hiking and biking. The park extends over 663 square acres, allowing residents to explore as they discover the parkâ€™s hidden gems. In addition, the park also offers lodging and camping areas for those who wish to turn the park into an overnight experience.