| 127* | DA Lewis | Ireland v Gibraltar | Victoria Institute, Kuala Lumpur | 1996/97 |
| 115* | EC Joyce | Ireland v United Arab Emirates | Civil Service Cricket Club, Stormont, Belfast | 2005 |
| 104* | PJ Davy | Ireland v Canada | G Ross Lord Park Lower Ground, Toronto | 2001 |
| 103 | EC Joyce | Ireland v Bermuda | Civil Service Cricket Club, Stormont, Belfast | 2005 |
| 95* | JD Curry | Ireland v Papua New Guinea | G Ross Lord Park Lower Ground, Toronto | 2001 |
| 93 | JAM Molins | Ireland v Netherlands | Maple Leaf South-East Ground, King City | 2001 |
| 93 | EJG Morgan | Ireland v Bermuda | Civil Service Cricket Club, Stormont, Belfast | 2005 |
| 87 | EC Joyce | Ireland v United Arab Emirates | Armour Heights, Toronto | 2001 |
| 81* | JAM Molins | Ireland v Hong Kong | Ajax Cricket Club, Toronto | 2001 |
| 81 | EC Joyce | Ireland v Scotland | Castle Avenue, Dublin | 2005 |
| 80 | EC Joyce | Ireland v United States of America | Armour Heights, Toronto | 2001 |