Thomas Duncan

Thomas Duncan may refer to:

• Thomas Duncan (general) (1819–1887), United States Army general during the Civil War
• Thomas Duncan (Canadian politician) (died 1910), politician in Manitoba, Canada
• Thomas Duncan (painter) (1807–1845), Scottish portraitist and historical painter
• Thomas Duncan (American politician) (1893–1959), Milwaukee Socialist senator and representative
• Thomas Young Duncan (1836–1914), New Zealand Liberal Party politician
• Thomas William Duncan (1905–1987), US writer
• Thomas Eric Duncan (1972–2014), first person to die of Ebola in the United States
• Tommy Duncan (1911–1967), American musician
• Tommy Duncan (footballer) (born 1936), Scottish footballer and manager