There are 2 US Post Offices in Haakon County serving a total of 1,960 residents equating to 980 residents per post office. It's estimated that approximately 3,128 packages are handled across the 2 county post offices annually. Haakon County is a county located in the U.S. state of South Dakota. As of the 2010 census, the population was 1,937. Its county seat is Philip."