Geoffrey Herbert Hooper was an Australian World War I flying ace credited with eleven aerial victories, all against German fighter planes.

11 Squadron RFC as pilot of a Bristol F.2 Fighter on 12 April 1917, three days before his 26th birthday.

With Harold Leslie Edwards manning the guns, he scored triple wins on 25 and 29 September, to become a double ace.

[5] On 8 May 1919, Hooper relinquished his commission upon completion of service but retained the rank of lieutenant.

When leading a patrol of four machines, he attacked ten enemy aircraft; during the engagement five of them were destroyed, two by himself.

He has invariably displayed great gallantry and skill when engaged in aerial combats.