There are 6 US Post Offices in Boone County serving a total of 24,310 residents equating to 4,052 residents per post office. It's estimated that approximately 38,801 packages are handled across the 6 county post offices annually. Boone County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 26,306. Its county seat is Boone. Boone County comprises the Boone, IA Micropolitan Statistical Area, which is included in the Des Moines-Ames-West Des Moines, IA Combined Statistical Area."