Lucy Katherine O'Reilly (born 9 November 1999) is an Irish cricketer who plays primarily as a right-arm medium bowler. In June 2018, she was named in Ireland's squad for the 2018 ICC Women's World Twenty20 Qualifier tournament. She was the leading wicket-taker for the tournament, with eleven dismissals in four matches. Following the conclusion of the tournament, she was named as the rising star of Ireland's squad by the International Cricket Council (ICC). In July 2018, she was named in the ICC Women's Global Development Squad. She played in the Women's Super Series for Scorchers.