Hakan Hayrettin (born 4 February 1970) is an English football coach and former player who was most recently the manager of Dulwich Hamlet.

In August 1994 he moved to Cambridge United on a free transfer where He suffered a serious knee injury limiting his appearances for the club.

He never made the first team with Doncaster and was released in October 1996 due to the same serious knee injury he suffered at Cambridge at the start of the season.

He joined Watford as a youth coach, but continued his player career in non-league football with Heybridge Swifts before moving on to Hayes, Rushden & Diamonds and Harrow Borough.

He left Boreham Wood in July 2000 to rejoin Harrow Borough, both as a player and a coaching assistant, whilst working as a stock processing manager.

Hayrettin joined Waltham Forest as manager in the 2003 close season,[3] helping the club to win the Essex Senior Cup.

[6] On 26 May 2011, he was appointed manager of Isthmian League Division One North side Grays Athletic, signing a two-year contract.