There are 12 US Post Offices in Kossuth County serving a total of 14,830 residents equating to 1,236 residents per post office. It's estimated that approximately 23,670 packages are handled across the 12 county post offices annually. Kossuth County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 15,543. The county seat is Algona."