There are 6 US Post Offices in Wayne County serving a total of 6,231 residents equating to 1,039 residents per post office. It's estimated that approximately 9,945 packages are handled across the 6 county post offices annually. Wayne County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 6,403, making it the fifth-least populous county in Iowa. The county seat is Corydon."