Duncan John Robertson (born 6 February 1947) is a former New Zealand rugby union player.
He represented Otago at a provincial level, making 104 appearances and playing most of his games at second five-eighth.
Robertson was a member of the New Zealand national side, the All Blacks, from 1973 to 1977, playing mostly as a first five-eighth, but also as a fullback towards the end of his career.
He played 30 matches for the All Blacks including 10 internationals.
[1] This biographical article relating to New Zealand rugby union, about a person born in the 1940s, is a stub.