There are 7 US Post Offices in Hickory County serving a total of 8,044 residents equating to 1,149 residents per post office. It's estimated that approximately 12,839 packages are handled across the 7 county post offices annually. Hickory County is a county located in the U.S. state of Missouri. As of the 2010 census, the population was 9,627. Its county seat is Hermitage. The county was organized February 14, 1845, and named after President Andrew Jackson, whose nickname was \"Old Hickory.\""