There are 3 US Post Offices in Ogemaw County serving a total of 17,852 residents equating to 5,951 residents per post office. It's estimated that approximately 28,494 packages are handled across the 3 county post offices annually. Ogemaw County is a county located in the U.S. state of Michigan. As of the 2010 census, the population was 21,699. The county seat is West Branch. The county newspaper of record is the Ogemaw Herald."