There are 7 US Post Offices in Lewis County serving a total of 16,766 residents equating to 2,395 residents per post office. It's estimated that approximately 26,760 packages are handled across the 7 county post offices annually. Lewis County is a county located in the U.S. state of West Virginia. As of the 2010 census, the population was 16,372. Its county seat is Weston. The county was founded in 1816."