There are 4 US Post Offices in Davis County serving a total of 8,796 residents equating to 2,199 residents per post office. It's estimated that approximately 14,039 packages are handled across the 4 county post offices annually. Davis County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 8,753. The county seat is Bloomfield. Davis County is included in the Ottumwa, IA Micropolitan Statistical Area."