| 1 | 98 | JE Neill & RD Hunter | Ireland Under-19s v England Under-19s | Haslegrave Ground, Loughborough | 2023 |
| 2 | 91 | C Dougherty & BJ Ackland | Ireland Under-19s v Bermuda Under-19s | Royal Selangor Club, Kuala Lumpur | 2007/08 |
| 3 | 166 | EJG Morgan & KJ O'Brien | Ireland Under-19s v Uganda Under-19s | MA Aziz Stadium, Chittagong | 2003/04 |
| 4 | 160 | EJG Morgan & AD Poynter | Ireland Under-19s v New Zealand Under-19s | R Premadasa Stadium, Colombo | 2005/06 |
| 5 | 117 | BJ Ackland & LT Nelson | Ireland Under-19s v South Africa Under-19s | Queenstown Events Centre, Queenstown | 2009/10 |
| 5 | 117 | GJ Roulston & SJ MacBeth | Ireland Under-19s v England Under-19s | Haslegrave Ground, Loughborough | 2023 |
| 6 | 67 | RS Haire & JF Mooney | Ireland Under-19s v Sri Lanka Under-19s | Sinhalese Sports Club Ground, Colombo | 1999/00 |
| 7 | 65 | JC McNally & H Dyer | Ireland Under-19s v Pakistan Under-19s | JB Marks Cricket Oval, Potchefstroom | 2023/24 |
| 8 | 56 | K Spelman & RD McGerrigle | Ireland Under-19s v Australia Under-19s | Colombo Cricket Club Ground, Colombo | 1999/00 |
| 9 | 62 | [unknown] & [unknown] | Ireland Under-19s v Denmark Under-19s | Christian Brothers College Old Boys Ground, Boksburg | 1997/98 |
| 10 | 61* | AK Riddles & AJ Coulter | Ireland Under-19s v Australia Under-19s | MA Aziz Stadium, Chittagong | 2003/04 |
