William Keith

William Keith may refer to:

• William Keith (footballer), Scottish footballer
• William Keith of Galston (d.1336), Scottish soldier during the Wars of Scottish Independence
• William Keith, 4th Earl Marischal (d. 1581)
• William Keith, 6th Earl Marischal (c 1585–1635), Scottish peer and naval officer
• William Keith, 7th Earl Marischal (1610–1670 or 1671), Scottish Covenanter
• William Keith, 9th Earl Marischal (1644–1712), Scottish Jacobite politician
• Sir William Keith, 4th Baronet (1669–1749), Governor of Pennsylvania and Delaware
• William Keith (artist) (1838–1911), American artist famous for his California landscape paintings
• Bill Keith (artist) (1929–2004), American artist
• Bill Keith (musician) (1939–2015), American banjoist
• William H. Keith, Jr. (born 1950), author