There are 5 US Post Offices in Autauga County serving a total of 25,770 residents equating to 5,154 residents per post office. It's estimated that approximately 41,132 packages are handled across the 5 county post offices annually. Autauga County is a county in the U.S. state of Alabama. As of the 2010 census the population was 54,571. Its county seat is Prattville. Autauga County is part of the Montgomery Metropolitan Statistical Area."