There are 5 US Post Offices in Emmet County serving a total of 10,454 residents equating to 2,091 residents per post office. It's estimated that approximately 16,686 packages are handled across the 5 county post offices annually. Emmet County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 10,302. The county seat is Estherville."