| Wkt |
| 3 | 166 | EJG Morgan (117) & KJ O'Brien (70) | Ireland Under-19s v Uganda Under-19s | MA Aziz Stadium, Chittagong | 2003/04 |
| 4 | 160 | EJG Morgan (124) & AD Poynter (76) | Ireland Under-19s v New Zealand Under-19s | R Premadasa Stadium, Colombo | 2005/06 |
| 3 | 159* | JM Dickson (78*) & TH Tector (76*) | Ireland Under-19s v Zimbabwe Under-19s | Queen's Park Oval, Port of Spain | 2021/22 |
| 5 | 138 | A Leckey (88) & S Dijkstra (62) | Ireland Under-19s v Zimbabwe Under-19s | Harare Sports Club, Harare | 2024/25 |
| 3 | 137 | JD Hall (75) & PR Stirling (59) | Ireland Under-19s v Bermuda Under-19s | Johor Cricket Academy Oval, Johor | 2007/08 |
| 3 | 129 | GJ Roulston (82) & K Hilton (72) | Ireland Under-19s v New Zealand Under-19s | Mangaung Oval, Bloemfontein | 2023/24 |
| 5 | 117 | BJ Ackland (66) & LT Nelson (55) | Ireland Under-19s v South Africa Under-19s | Queenstown Events Centre, Queenstown | 2009/10 |
| 5 | 117 | GJ Roulston (73) & SJ MacBeth (90*) | Ireland Under-19s v England Under-19s | Haslegrave Ground, Loughborough | 2023 |
| 5 | 116 | HT Tector (69) & NA Rock (91) | Ireland Under-19s v West Indies Under-19s | Bert Sutcliffe Oval, Lincoln | 2017/18 |
| 2 | 114 | F Ogilby (69) & A Leckey (66) | Ireland Under-19s v Zimbabwe Under-19s | Harare Sports Club, Harare | 2024/25 |
| 5 | 113 | LJ Tucker (57) & WT McClintock (58) | Ireland Under-19s v India Under-19s | Shere Bangla National Stadium, Mirpur | 2015/16 |
| 5 | 107 | LJ Tucker (59) & WT McClintock (69) | Ireland Under-19s v Scotland Under-19s | Sheikh Kamal International Cricket Stadium, Cox's Bazar | 2015/16 |
| 5 | 106 | HT Tector (101) & NA Rock (55) | Ireland Under-19s v Namibia Under-19s | Lincoln No 3, Lincoln | 2017/18 |
| 5 | 104 | PR Stirling (114) & GF McDonnell (35*) | Ireland Under-19s v United States of America Under-19s | Queenstown Events Centre, Queenstown | 2009/10 |
| 1 | 98 | JE Neill (77) & RD Hunter (47) | Ireland Under-19s v England Under-19s | Haslegrave Ground, Loughborough | 2023 |
| 3 | 93 | GC Wilson (64) & KJ O'Brien (95) | Ireland Under-19s v West Indies Under-19s | Khulna Divisional Stadium, Khulna | 2003/04 |
| 4 | 92 | R O'Brien (42) & S Dijkstra (65) | Ireland Under-19s v Zimbabwe Under-19s | Harare Sports Club, Harare | 2024/25 |
| 2 | 91 | C Dougherty (70) & BJ Ackland (37) | Ireland Under-19s v Bermuda Under-19s | Royal Selangor Club, Kuala Lumpur | 2007/08 |
| 2 | 88 | FP McAllister (44) & EJG Morgan (124) | Ireland Under-19s v New Zealand Under-19s | R Premadasa Stadium, Colombo | 2005/06 |
| 3 | 88 | GJ Roulston (81) & K Hilton (56) | Ireland Under-19s v Zimbabwe Under-19s | Absa Puk Oval, Potchefstroom | 2023/24 |
| 2 | 87 | RD Hunter (46) & GJ Roulston (81) | Ireland Under-19s v Zimbabwe Under-19s | Absa Puk Oval, Potchefstroom | 2023/24 |
| 2 | 85 | JB Tector (56) & A Dennison (46) | Ireland Under-19s v New Zealand Under-19s | Khan Shaheb Osman Ali Stadium, Fatullah | 2015/16 |
| 5 | 84 | A Leckey (91*) & E Marshall (41) | Ireland Under-19s v Zimbabwe Under-19s | Harare Sports Club, Harare | 2024/25 |
| 5 | 81 | K Hilton (90) & SJ MacBeth (27) | Ireland Under-19s v Bangladesh Under-19s | Mangaung Oval, Bloemfontein | 2023/24 |
| 1 | 80 | JB Grassi (51) & ME Donegan (30) | Ireland Under-19s v Namibia Under-19s | Lincoln No 3, Lincoln | 2017/18 |
| 1 | 75 | WTS Porterfield (44) & GC Wilson (48) | Ireland Under-19s v Australia Under-19s | MA Aziz Stadium, Chittagong | 2003/04 |
| 1 | 75 | JB Tector (33) & ST Doheny (33) | Ireland Under-19s v Canada Under-19s | Sheikh Kamal International Cricket Stadium, Cox's Bazar | 2015/16 |
| 1 | 73 | JB Grassi (75) & ME Donegan (36) | Ireland Under-19s v Sri Lanka Under-19s | Cobham Oval (New), Whangarei | 2017/18 |
| 5 | 72 | HT Tector (36) & NA Rock (35) | Ireland Under-19s v Afghanistan Under-19s | Cobham Oval (New), Whangarei | 2017/18 |
| 4 | 71 | AR McBrine (41) & SC Getkate (47) | Ireland Under-19s v Nepal Under-19s | Endeavour Park, Townsville | 2012 |
