There are 12 US Post Offices in Wharton County serving a total of 41,237 residents equating to 3,436 residents per post office. It's estimated that approximately 65,819 packages are handled across the 12 county post offices annually. Wharton County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 41,280. Its county seat is Wharton. The county was named for brothers William Harris Wharton and John Austin Wharton. The El Campo, TX Micropolitan Statistical Area includes all of Wharton County."