Horace Keats Lester (4 August 1904 – 16 June 1946) was a tennis player from England who competed for Great Britain.

His only match was a dead rubber in Great Britain's Europe Zone semi-final win over Spain in Barcelona, which he lost in straight sets to Raimundo Morales-Marques.

He was beaten in the fourth round by Patrick Spence, after having wins over Frenchman Alain Bernard, American Jimmy Van Alen and South African Jack Condon.

Lester was killed on 16 June 1946, when he fell 100 feet from the roof of his block of flats[4] in Chesham Place, Westminster.

[5] It was initially reported that he had been sleepwalking but an inquest in July ruled that Lester had committed suicide, while of "unsound mind".