| 109 | Simranjit Singh | Leinster Cricket Union v Munster | Anglesea Road, Dublin | 2017 |
| 98 | Irfan Ahmed | Hong Kong v Namibia | Castle Avenue, Dublin | 2015 |
| 98* | MC Sorensen | Leinster Cricket Union v Munster | Anglesea Road, Dublin | 2017 |
| 97 | RG Sharma | India v Ireland | The Village, Malahide, Dublin | 2018 |
| 90* | JW Jenner | Jersey v Namibia | Castle Avenue, Dublin | 2015 |
| 87 | SJ Baard | Namibia v Papua New Guinea | The Village, Malahide, Dublin | 2015 |
| 82 | G Snyman | Namibia v Jersey | Castle Avenue, Dublin | 2015 |
| 81* | PW Gough | Jersey v Hong Kong | Magheramason, Bready | 2015 |
| 80 | GC Wilson | Northern Cricket Union v Munster | Mardyke, Cork | 2018 |
| 79 | A Balbirnie | Leinster Cricket Union v Northern Cricket Union | Cooke Collegians Cricket Club, Shaw's Bridge Upper Ground, Belfast | 2018 |
| 77 | GJ Delany | Leinster Cricket Union v Munster | Sydney Parade, Dublin | 2018 |
| 74 | S Dhawan | India v Ireland | The Village, Malahide, Dublin | 2018 |
| 71* | A Balbirnie | Leinster Cricket Union v Northern Cricket Union | Anglesea Road, Dublin | 2017 |
| 70 | KL Rahul | India v Ireland | The Village, Malahide, Dublin | 2018 |
| 69 | SK Raina | India v Ireland | The Village, Malahide, Dublin | 2018 |
| 67 | JNK Shannon | Northern Cricket Union v Munster | Middle Road, Carrickfergus | 2017 |
| 65* | Nawroz Mangal | Afghanistan v Papua New Guinea | The Village, Malahide, Dublin | 2015 |
| 62* | AC Botha | Ireland v Bangladesh A | Woodvale Road, Eglinton | 2008 |
| 62 | G Snyman | Namibia v United States of America | Civil Service Cricket Club, Stormont, Belfast | 2015 |
| 62 | SJ Baard | Namibia v Oman | The Village, Malahide, Dublin | 2015 |
| 62 | Nizakat Khan | Hong Kong v Ireland | Magheramason, Bready | 2016 |
| 62 | JNK Shannon | Northern Cricket Union v North West | Circular Road, Belfast | 2017 |
| 62* | ST Doheny | Munster v Northern Cricket Union | Mardyke, Cork | 2018 |
| 61* | SJ Baard | Namibia v Jersey | Castle Avenue, Dublin | 2015 |
| 60 | MH Cross | Scotland v Ireland | Magheramason, Bready | 2015 |
| 60 | JNK Shannon | Ireland v India | The Village, Malahide, Dublin | 2018 |
| 59 | JB Tector | Munster v Northern Cricket Union | Mardyke, Cork | 2017 |
| 59 | RJ Forrest | Munster v Leinster Cricket Union | Anglesea Road, Dublin | 2017 |
| 57 | Shakib Al Hasan | Bangladesh v Ireland | Civil Service Cricket Club, Stormont, Belfast | 2012 |
| 57 | EJ Farley | Jersey v Hong Kong | Magheramason, Bready | 2015 |
| 57* | WTS Porterfield | Ireland v Papua New Guinea | Civil Service Cricket Club, Stormont, Belfast | 2015 |
| 57 | NG Jones | Northern Cricket Union v North West | Civil Service Cricket Club, Stormont, Belfast | 2018 |
| 56 | RN ten Doeschate | Netherlands v Kenya | Civil Service Cricket Club, Stormont, Belfast | 2008 |
| 56* | WTS Porterfield | Ireland v Namibia | Civil Service Cricket Club, Stormont, Belfast | 2015 |
| 56 | GJ Thompson | Northern Cricket Union v Leinster Cricket Union | Anglesea Road, Dublin | 2017 |
| 55 | PR Stirling | Ireland v Jersey | The Village, Malahide, Dublin | 2015 |
| 55 | JNK Shannon | Northern Cricket Union v Leinster Cricket Union | Instonians Cricket Club, Shaw's Bridge Lower Ground, Belfast | 2017 |
| 54 | RR Watson | Scotland v Kenya | Civil Service Cricket Club, Stormont, Belfast | 2008 |
| 53 | Nawroz Mangal | Afghanistan v Hong Kong | The Village, Malahide, Dublin | 2015 |
| 52 | G Malla | Nepal v United States of America | Civil Service Cricket Club, Stormont, Belfast | 2015 |
| 52* | AR McBrine | North West v Munster | Woodvale Road, Eglinton | 2017 |
| 51* | Zeeshan Siddiqui | Oman v Namibia | The Village, Malahide, Dublin | 2015 |
| 51 | JNK Shannon | Northern Cricket Union v Leinster Cricket Union | Anglesea Road, Dublin | 2017 |
| 51 | DA Rankin | North West v Northern Cricket Union | Civil Service Cricket Club, Stormont, Belfast | 2018 |
| 50* | Nasir Hossain | Bangladesh v Ireland | Civil Service Cricket Club, Stormont, Belfast | 2012 |
| 50 | JB Tector | Munster v Leinster Cricket Union | Anglesea Road, Dublin | 2017 |
| 50* | GJ Thompson | Northern Cricket Union v Munster | Mardyke, Cork | 2018 |