William Duncan

William Duncan may refer to:

Arts, entertainment, and literature

 * William Cary Duncan (1874–1945), American playwright and author
 * William Duncan (actor) (1879–1961), Scottish-born actor and director of film serials
 * W. Murdoch Duncan (1909–1976), Scottish crime thriller author

Medicine and science

 * Sir William Duncan, 1st Baronet (died 1774), Scottish physician
 * William Duncan (American physician) (1840–1900)
 * William Henry Duncan (1805–1863), English doctor and Britain's first Chief Medical Officer
 * William Jolly Duncan (1894–1960), Scottish physicist

Politicians

 * William Addison Duncan (1836–1884), U.S. Representative from Pennsylvania
 * William C. Duncan (1820–1877), brewer, politician, and mayor of Detroit, Michigan
 * William Duncan (Maryland politician) (1871–1925), American politician and lawyer
 * William Garnett Duncan (1800–1875), U.S. Representative from Kentucky

Sports

 * Art Duncan (William James Arthur Duncan, 1891–1975), Canadian ice hockey professional and World War I flying ace
 * Bill Duncan (1880–?), Scottish footballer
 * William Butler Duncan II (1862–1933), American yachtsman and adoptive son of William Butler Duncan I
 * William Dow Duncan (1892–1961), New Zealand rugby player
 * William Duncan (Australian cricketer) (1912–1943), Australian cricketer
 * William Duncan (footballer) (1913–1975), Scottish association football player
 * William Duncan (New Zealand cricketer) (1933–2008), New Zealand cricketer
 * William H. Duncan, American diplomat

Others

 * W. Butler Duncan I (1830–1912), Scottish-American banker and railroad executive
 * William Augustine Duncan (1811–1885), Scottish journalist and colonial official
 * William Barr McKinnon Duncan (1922–1984), Scottish-born director of Imperial Chemical Industries, chief executive of Rolls-Royce
 * William Duncan (missionary) (1832–1918), English-born Anglican missionary
 * William Duncan (philosopher) (1717–1760), Scottish natural philosopher and classicist
 * William fitz Duncan (1090/1094–1147), Scottish prince and general
 * William Wallace Duncan (1839–1908), American bishop of the Methodist Episcopal Church, South