John Austin Thomas Hanlon (18 December 1905 - 17 October 1983) was an English athlete who competed for Great Britain in the 1928 Summer Olympics.
He was born in Portsmouth and died in Morpeth, Northumberland.
In 1928 he was eliminated in the first round of the Olympic 400 metre event.
At the 1930 Empire Games he won the silver medal with the English relay team in the 4×110 yards competition. In the 220 yards contest and in the 440 yards event he was eliminated in the heats.