There are 4 US Post Offices in Missaukee County serving a total of 13,023 residents equating to 3,256 residents per post office. It's estimated that approximately 20,786 packages are handled across the 4 county post offices annually. Missaukee County is a county located in the U.S. state of Michigan. As of the 2010 census, the population was 14,849. The county seat is Lake City. Missaukee County is part of the Cadillac, MI Micropolitan Statistical Area. The county is considered to be part of Northern Michigan.