There are 3 US Post Offices in Wilkinson County serving a total of 10,871 residents equating to 3,624 residents per post office. It's estimated that approximately 17,351 packages are handled across the 3 county post offices annually. Wilkinson County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 9,878. Its county seat is Woodville. The county is named for James Wilkinson, a Revolutionary War military leader and first governor of the Louisiana Territory after its acquisition by the United States in 1803."