There are 2 US Post Offices in Holmes County serving a total of 18,262 residents equating to 9,131 residents per post office. It's estimated that approximately 29,148 packages are handled across the 2 county post offices annually. Holmes County is a county located in the U.S. state of Florida. As of the 2010 census, the population was 19,927. Its county seat is Bonifay."