Sir Henry Ralph Stanley 'Tim' Birkin, 3rd Baronet (July 26, 1896 – June 22, 1933) was a British racing driver, one of the Bentley Boys of the 1920s.
He took part in two European Championship events – the 1931 French and Belgian Grands Prix, where he finished fourth in both.
Birkin took part in the Tripoli Grand Prix on May 7, 1933. During the race he burned his arm against an exhaust pipe, and the wound turned septic. Combined with him contracting malaria while in Libya, Birkin took ill and died in a London nursing home several weeks later.