There are 7 US Post Offices in Austin County serving a total of 29,344 residents equating to 4,192 residents per post office. It's estimated that approximately 46,836 packages are handled across the 7 county post offices annually. Austin County is a county in the U.S. state of Texas. As of the 2010 census, the population was 28,417. Its seat is Bellville. The county is named for Stephen F. Austin, who facilitated the Anglo American colonization of Texas and is known as the \"Father of Texas.\" Austin County is included in the Houston-The Woodlands-Sugar Land, TX Metropolitan Statistical Area. Austin County is not to be confused with the city of Austin, the state capital city that lies in Travis County approximately 110 miles to the northwest."