Catherine O'Neill born 4 December 1975) is a former Paralympian athlete from Ireland who competed mainly in category F51 track and field events.

[2] She first represented Ireland at a major international tournament at Birmingham during the 1998 IPC Athletics World Championships, winning gold in the F51 women's discus throw.

[2] Initially specializing in the discus, show progressed in her later career to also entering club throw events.

Her only Paralympic podium finish came at London, where she won a silver in the discus throw – F51/52/53.

After the 2014 IPC Athletics European Championships at Swansea, O'Neill decided to retire from sport.