Derek Austin Graham (born 3 September 1941) is a retired distance athlete from Northern Ireland.
The first Northern Irish runner to break 4 minutes for the mile, he was ranked number 1 in the U.K. and Ireland over 2 miles/3000 m, 3 miles/5000 m and cross country at various periods in the 1960s.
He competed in the 1964 Tokyo Olympics for Great Britain, finishing seventh in his initial heat for the 5000m race.
At the 1970 Commonwealth Games, Graham picked up a virus which later developed into myalgic encephalomyelitis, ultimately ending his athletics career.
This biographical article relating to athletics in Northern Ireland is a stub.