Geoff Mahon (24 April 1915 – 16 February 1971)[2] was an Australian rules footballer who played with Geelong in the VFL.
A ruckman, Mahon debuted for Geelong in 1936 and the following season was a reserve in their premiership side. He played for Geelong for five years before crossing to Victorian Football Association club Prahran without a clearance in 1941.[3] He returned to Geelong in 1946 and won Geelong's best and fairest.