Derek David Hales (born 15 December 1951) is an English former footballer.
He is the all-time leading goalscorer for Charlton Athletic (when both league and cup games are taken into account), with his most prolific season being 1975-76, when he scored 28 league goals and was leading scorer in the Football League Second Division.
He is also famous for an on-field fight with teammate Mike Flanagan during an FA Cup tie against Maidstone in 1979.After running a pub in his native village Lower Halstow, he is now employed at the Howard School in Gillingham.