Douglas "Dally" Duncan (14 October 1909 – 2 January 1990) was a Scottish football player and manager.
A left-winger, Duncan joined Hull City from Aberdeen Richmond in 1928 and spent his entire professional career in English football.
During this period he earned 14 caps in the Scotland national team, scoring 7 goals between 1932 and 1937.
After "guesting" for Reading, Notts County and Nottingham Forest during World War II, Duncan moved to Luton Town as a player-coach in October 1946.
This biographical article related to association football in Scotland, about a midfielder born in the 1900s, is a stub.