Christopher O'Donnell (born 17 May 1998) is an Irish track and field athlete competing in sprinting events.
He is the current Irish U20 record holder in the 400 metres, with a time of 46.54, set on 22 July 2017 at the European U20 Championships, where he finished 6th in the final.
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He is the current Irish senior champion over 400 metres, winning back-to-back titles in 2018 and 2019.