Adam Duncan

Adam Duncan may refer to:


 * Adam Duncan, 1st Viscount Duncan (1731–1804), British admiral
 * Adam Duncan (sailor) (1833–?), sailor in the Union Navy in the American Civil War, recipient of the Medal of Honor
 * Adam Duncan (cricketer) (1852–1940), English lawyer and cricketer
 * Scott Duncan (footballer) (1888–1975), Scottish footballer and manager
 * Adam M. Duncan (1927–2000), member of the Utah state legislature