Gyula Dobay (18 November 1937 – 11 June 2007) was a freestyle swimmer from Hungary.

He competed at the 1956, 1960 and 1964 Olympics in eight events in total with the best result of fifth place in the 100 m freestyle in 1960.

After the 1956 Olympics, Dobay defected to the United States due to the Soviet invasion of Hungary.

He stayed there for 16 months, but failed to find a stable job and returned to Hungary.

This biographical article related to a Hungarian swimmer is a stub.