William Cornwell

William Cornwell may refer to:
 * William Cornwell (cricketer) (1838–1915), English cricketer
 * William B. Cornwell (1864–1926), American lawyer, businessman and publisher in West Virginia
 * William H. Cornwell (1843–1903), American businessman and Hawaiian politician
 * William J. Cornwell (1809–1896), American lawyer and politician from New York