Jonathan Penrose, OBE (born 7 October 1933, in Colchester) is an English chess Grandmaster and International Correspondence Chess Grandmaster (1983) who won the British Chess Championship ten times between 1958 and 1969.
He is the son of Lionel Penrose, a world-famous professor of genetics, the grandson of the physiologist John Beresford Leathes, and brother of Roger Penrose and Oliver Penrose.
He is a psychologist and university lecturer by profession, with a PhD.