William Cann may refer to: William Derwood Cann Jr. (1919–2010), college professor, manufacturing executive, and interim mayor of Monroe, Louisiana Billy Cann (1882–1958), rugby league player Billy Cann (politician) from 2011 Prince Edward Island general election William Cann of the Cann baronets 1974 assassination of William Cann, police chief of Union City, California
See also William Conrad (1920–1994), born John William Cann, actor Cann (disambiguation)