Alfred Robert "Bob" Foster (16 March 1911 – 22 March 1982) was a British professional Grand Prix motorcycle road racer.
Foster's win on a unit-construction New Imperial in the 1936 Isle of Man TT was the last time that Great Britain won a Lightweight TT.He won 1950 FIM 350cc World Championship on a Velocette.
He also won the 1947 Junior TT at the Isle of Man TT races, the first TT held after the end of the Second World War.