WASHINGTON, DC and CHARLESTON, WV ---United Bankshares, Inc. ("United") (NASDAQ: UBSI) Chairman and Chief Executive Officer, Richard M. Adams, announced the signing of a definitive merger agreement with Premier Community Bankshares, Inc. ("Premier") headquartered in Winchester, Virginia. The acquisition of Premier will afford United the opportunity to further expand market share in the Metro DC area and enter new Virginia markets in the Winchester, Harrisonburg and Charlottesville areas. Since 1982, United has completed and effectively integrated 26 acquisitions. Five of the last seven acquisitions have occurred in the suburban Maryland/Northern Virginia/Washington D.C. market.