Preston County is a county located in the U.S. state of West Virginia. As of the 2020 Census, the population was 34,216. 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 is the southernmost county of the Pittsburgh media market. It is the home of The Buckwheat Festival, a county fair known for making buckwheat pancakes.