| 01 October 2023 |
Sanctury Runners |
|
| 05 October 2023 |
The Food, Retail & Hospitality Expo (Premier Publishing) |
Sport Ireland National Indoor Arena |
| 7 - 8 October |
International Brazilian Jiu-Jitsu Federation - International Open |
Sport Ireland National Indoor Arena |
| 14 - 15 October |
ONAKAI 2023 Irish Open |
Sport Ireland National Indoor Arena |
| 16 October 2023 |
Leinster Future Challengers |
Sport Ireland National Aquatic Centre |
| 16 October 2023 |
NAC SC Short Course Gala |
Sport Ireland National Aquatic Centre |
| 20 - 22 October |
Fencing Ireland - Irish Open/Satellite World Cup |
Sport Ireland National Indoor Arena |
| 21 October 2023 |
Irish Taekwon-Do Association - Open International |
Sport Ireland National Indoor Arena |
| 21 - 22 October |
Leinster Aspiring Champions |
Sport Ireland National Aquatic Centre |
| 28 October - 29 October |
Gymnastics Ireland National Series |
Sport Ireland National Indoor Arena |
