There are 5 US Post Offices in Laclede County serving a total of 35,656 residents equating to 7,131 residents per post office. It's estimated that approximately 56,911 packages are handled across the 5 county post offices annually. Laclede County is a county located in the U.S. state of Missouri. As of the 2010 census, the population was 35,571. Its county seat is Lebanon. The county was organized February 24, 1849, and was named after Pierre Lacl\u00e8de, founder of St. Louis. Laclede County comprises the Lebanon, MO Micropolitan Statistical Area.