There are 12 US Post Offices in Pottawattamie County serving a total of 51,102 residents equating to 4,259 residents per post office. It's estimated that approximately 81,564 packages are handled across the 12 county post offices annually. Pottawattamie County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 93,158. The county takes its name from the Potawatomi Native American tribe. The county seat is Council Bluffs. Pottawattamie County is included in the Omaha-Council Bluffs, NE-IA Metropolitan Statistical Area."