Jack O'Reilly (born 7 May 1914, date of death unknown) was an Irish footballer. He was born in Cobh. He joined Cork in 1935 as an outside right. The following year he was a runner up in the FAI Cup Final to Shamrock Rovers. However shortly afterwards he became embroiled in controversy when it emerged that, together with Owen Madden, he had signed for Norwich City before playing in the cup final on 19 April. When Cork F.C., who received no fee, protested over the moves, both O'Reilly and Madden were suspended by the FAI for three years.