Gerald O'Sullivan may refer to:
Gerald O'Sullivan (judge) (1891–1960), Australian judge, acting Judge on the New South Wales Supreme Court Gerald Robert O'Sullivan (1888–1915), Irish soldier in the British Army and recipient of the Victoria Cross Gearóid O'Sullivan (1891–1948), Irish teacher, army officer, barrister and Sinn Féin and Fine Gael politician.
See also Gerry O'Sullivan, Irish politician Gerry O'Sullivan (media) Jerry O'Sullivan (disambiguation)