Duncan David Elias (born 14 July 1985) is a Singaporean footballer who played as a defender in the S.League for Geylang International.
Duncan is known for being a set-piece specialist and is a regular corner taker for corners on the right side of the pitch due to his ability to deliver in-swinging crosses with his left foot.
On 23 November 2012, Woodlands Wellington announced that he would not be retained for the 2013 season.
On 4 January 2013, it was confirmed during a press conference by the Eagles that Duncan would be moving to Geylang International.
He was unable to secure a long-term contract with any football team in 2014.