There are 11 US Post Offices in Kandiyohi County serving a total of 41,711 residents equating to 3,792 residents per post office. It's estimated that approximately 66,575 packages are handled across the 11 county post offices annually. Kandiyohi County (/k\u00e6ndi\u02d0\u02c8jo\u028aha\u026a/ kan-dee-YOH-hy) is a county located in the U.S. state of Minnesota. As of the 2010 census, its population was 42,239. Its county seat is Willmar. Kandiyohi County comprises the Willmar, MN Micropolitan Statistical Area."