King William County
There are 4 US Post Offices in King William County serving a total of 15,928 residents equating to 3,982 residents per post office. It's estimated that approximately 25,423 packages are handled across the 4 county post offices annually. King William County is a county located in the U.S. state of Virginia. As of the 2010 census, the population was 15,935. Its county seat is King William. King William County is located in the Middle Peninsula and is included in the Greater Richmond Region."