William Elliott may refer to:

• William Elliott (lieutenant) (died 1792), lieutenant in the Royal Navy and marine painter
• William Elliott (engraver) (1727–1766), English engraver
• Wild Bill Elliott (1904–1965), American film actor sometimes credited as Bill Elliott; birth name Gordon Nance
• William Elliott (actor, born 1934) (1934–1983), American stage and film actor
• William Elliott (actor, born 1879) (1879–1932), American stage and film actor
• Will Elliott (born 1979), Australian horror fiction writer
• William A. Elliott, art director

• William Elliott (lieutenant) (died 1792), lieutenant in the Royal Navy and marine painter
• William Henry Elliott (1792–1874), British general
• Sir William Elliot (RAF officer) (1896–1971), senior RAF commander during WWII
• William Elliott (RAF officer) (1898–1979), World War I flying ace

• William Yandell Elliott (1896–1979), American historian and political advisor
• William Elliott, Baron Elliott of Morpeth (1920–2011), British Conservative party politician, MP 1957–1983
• William J. S. Elliott, Commissioner of the Royal Canadian Mounted Police
• William Elliott (American politician) (1838–1907), U.S. congressman from South Carolina
• William Elliott (Peel MP) (1834–1912), member of the Canadian House of Commons representing Peel, 1878–1882
• William Elliott (Pennsylvania politician), Speaker of the Pennsylvania House of Representatives, 1872–1873
• William Elliott (Saskatchewan politician) (1863–1934), member of the Northwest Territories legislature 1898–1905 and Saskatchewan assembly 1905–1912
• William Elliott (Upper Canada politician) (1775–? or later), politician in Upper Canada
• William Elliott (Ontario politician) (1872–1944), Progressive Party member of the Canadian House of Commons
• William Herbert Elliott (1872–?), businessman and political figure in Ontario
• William M. Elliott (died 1882), American politician

• William Elliott Sr. (born 1955), American race car driver professionally known as Bill Elliott
• William Elliott Jr. (born 1995), American race car driver professionally known as Chase Elliott
• William Elliott (writer) (1788–1863), South Carolinian sportsman and writer
• William Elliott (rower) (1849–?), English professional sculling champion
• William Elliott (cricketer) (1842–?), English cricketer

• William Elliot (disambiguation)
• Billy Elliot (disambiguation)
• William Eliot (disambiguation)