The Dubliner finished first in the pool this afternoon.
Ellen Keane has won gold for Ireland at the Paralympics.
The Dubliner took first in the final of the SB8 100 metres breaststroke in a time of 1 minute 19-point-9-3 seconds.
It's Ireland's first medal of the games and a new personal best time for Keane.
The 26-year-old - who was a bronze medal winner in Rio four years ago - held off the challenge of New Zealand's Sophie Pascoe.
Limerick's Roisin Ni Riain also set a new personal best in the S13 100 metres backstroke final.
The 16-year-old finished in sixth place in a time of 1 minute 8-point-6-1 seconds.
The USA's Gia Pergolini took gold and set a new world record of 1 minute 4-point-6-4 seconds.
In Equestrian, Rosemary Gaffney and Werona failed to progress in the Grade 4 individual test after a 15th place finish.
Earlier, 2016 gold medal winning cyclists Katie-George Dunlevy and Eve McCrystal finished sixth in the B1000 metres time trial.
Ronan Grimes was 15th in the C4-5 100 metres time trial.
Colin Judge received a walkover in his scheduled Class 3 table tennis singles match and is back in action tomorrow.
Irish Athletics Mourns Death Of European Champion Ciara Mageean, Aged 34
St Kevin's Cruise Into Leinster Junior Football Quarter-Finals Following Muckalee Victory
Parsons Hat-Trick Helps Ireland Complete Series Victory Over South Africa
Milltown Begin Leinster Championship Campaign With Emphatic Victory Over Mostrim
Kildare's Lauren Walsh Finishes Strongly At Maybank Championship
Kilcock Secure Senior Football Survival As Allenwood Suffer Relegation
Sunday Morning Sports Update
Kildare Players Among Try Scorers As Leinster Thrash Connacht In Galway
