Imre Bennett Leader (born 30 October 1963) is a British mathematician, a professor in DPMMS at the University of Cambridge working in the field of combinatorics.

[3] He won a silver medal on the British team at the 1981 International Mathematical Olympiad (IMO) for pre-undergraduates.

[4] He later acted as the official leader of the British IMO team, taking over from Adam McBride in 1999, to 2001.

Cited results included the proof, with Reinhard Diestel, of the bounded graph conjecture of Rudolf Halin.

[12][13] Leader in an interview in 2016 stated that he began to play Othello in 1981, with his friend Jeremy Rickard.