Andy Duncan (born 20 October 1977) is an English former footballer who played as a centre-back.
The loan was turned into a permanent move in April 1998 for a fee of £20,000.
By the end of the 2006–07 season, Duncan had made 328 appearances for United, scoring 11 times.
He has also signed as a player for Chelmsford City in the Isthmian League.
This biographical article related to association football in England, about a defender born in the 1970s, is a stub.