William B. Cornwell
 William Benjamin Cornwell (November 25 1864 – April 8 1926) was a prominent American lawyer businessperson newspaper editor and publisher and railroad and timber executive in the U.S. state of West Virginia. Cornwell was an older brother of writer and newspaper publisher Marshall S. Cornwell (1871–1898) and of West Virginia Governor John J. Cornwell (1867–1953).Cornwell studied jurisprudence at the West Virginia University College of Law and afterward began practicing law in Romney.