Duncan Campbell may refer to:
Military figures
- Sir Duncan Campbell of Auchinbreck (1597–1645), commander of troops in Ireland
- Duncan Campbell (died 1758), Scottish nobleman and British Army officer
- Duncan Campbell (British Army officer, died 1837) (c. 1763–1837), British Army general, MP for Ayr Burghs 1809–18
- Duncan Carter-Campbell of Possil (1911–1990), British Army colonel
Musicians
- Duncan Campbell (trumpeter) (born 1926), Scottish musician
- Duncan Campbell (singer) (born 1958), lead singer of UB40
Politicians
- Duncan Campbell, 1st Lord Campbell (died 1453/4), Scottish nobleman and politician
- Sir Duncan Campbell, 2nd Baronet, MP for Argyllshire 1628–43
- Sir Duncan Campbell of Lochnell (c. 1682–1765), MP for Argyllshire, 1747–54
- Duncan J. Campbell (1845–1882), physician and political figure in Nova Scotia, Canada
- Duncan Campbell (Unionist MP) (1876–1916), Member of Parliament (MP) for North Ayrshire 1911–16
Journalists
- Duncan Campbell (journalist, born 1944), journalist on crime and Latin America
- Duncan Campbell (journalist) (born 1952), investigative journalist and television producer, best known for his work on Signals Intelligence
Others
- Duncan Campbell (soothsayer) (1680–1730), Scottish deaf-mute and professed soothsayer
- Duncan Campbell (revivalist) (1898–1972), Scottish preacher
- Duncan Campbell (snooker player) (born 1966), Scottish snooker player
- Duncan Campbell (artist) (born 1972), Irish artist
- Duncan Campbell (snowboarder) (born 1997), New Zealand snowboarder
- Duncan B. Campbell, ancient historian
- Duncan Campbell (settler), British settler to South Africa
See also
- Duncan Campbell Ross (1871–1961), Canadian lawyer and Liberal politician