There are 11 US Post Offices in Preston County serving a total of 30,381 residents equating to 2,762 residents per post office. It's estimated that approximately 48,491 packages are handled across the 11 county post offices annually. Preston County is a county located in the U.S. state of West Virginia. As of the 2010 census, the population was 33,520. Its county seat is Kingwood. The county was formed from Monongalia County in 1818 and named for Virginia Governor James Patton Preston. Preston County is part of the Morgantown, WV Metropolitan Statistical Area and the Pittsburgh DMA. It is the home of The Buckwheat Festival, a county fair known for making buckwheat cakes."