Alexander Duncan may refer to:

Alexander Duncan (army officer) (1780–1859), East India Company officer Alexander Duncan (athlete) (1884–1959), British Olympic runner Alexander Duncan (bishop) (1655–1733), Scottish Episcopal clergyman and bishop Alexander Duncan (politician) (1788–1853), U.S. Representative from Ohio Alexander Duncan (police officer) (1888–1965), Scottish police officer and Chief Commissioner of Victoria Police (Australia), 1937–1954 Alex Duncan (1900–1984), former Australian rules footballer Alexander Duncan (doctor), British doctor who spent six years in a village high up in the Wakhan Corridor of north-eastern Afghanistan Alexander William Duncan (1881–1934), Scottish cricketer and rugby player Alexander Duncan (footballer) (1891–?), Scottish footballer

See also