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
This disambiguation page lists articles about people with the same name.
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