| 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 | 137 | JD Hall (75) & PR Stirling (59) | Ireland Under-19s v Bermuda Under-19s | Johor Cricket Academy Oval, Johor | 2007/08 |
| 5 | 117 | BJ Ackland (66) & LT Nelson (55) | Ireland Under-19s v South Africa Under-19s | Queenstown Events Centre, Queenstown | 2009/10 |
| 5 | 116 | HT Tector (69) & NA Rock (91) | Ireland Under-19s v West Indies Under-19s | Bert Sutcliffe Oval, Lincoln | 2017/18 |
| 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 |
| 3 | 93 | GC Wilson (64) & KJ O'Brien (95) | Ireland Under-19s v West Indies Under-19s | Khulna Divisional Stadium, Khulna | 2003/04 |
| 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 |
| 2 | 85 | JB Tector (56) & A Dennison (46) | Ireland Under-19s v New Zealand Under-19s | Khan Shaheb Osman Ali Stadium, Fatullah | 2015/16 |
| 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, Whangarei | 2017/18 |
| 5 | 72 | HT Tector (36) & NA Rock (35) | Ireland Under-19s v Afghanistan Under-19s | Cobham Oval, Whangarei | 2017/18 |
| 4 | 71 | AR McBrine (41) & SC Getkate (47) | Ireland Under-19s v Nepal Under-19s | Endeavour Park, Townsville | 2012 |
| 6 | 67 | RS Haire (39) & JF Mooney (34) | Ireland Under-19s v Sri Lanka Under-19s | Sinhalese Sports Club Ground, Colombo | 1999/00 |
| 5 | 67 | AK Riddles (37) & PR Blakeney (27) | Ireland Under-19s v Papua New Guinea Under-19s | Khulna Divisional Stadium, Khulna | 2003/04 |
| 3 | 67 | [unknown] & [unknown] | Ireland Under-19s v Uganda Under-19s | Nondescripts Cricket Club Ground, Colombo | 2005/06 |
| 4 | 66 | EJG Morgan (86) & AD Poynter (28) | Ireland Under-19s v Nepal Under-19s | Nondescripts Cricket Club Ground, Colombo | 2005/06 |
| 6 | 64 | [unknown] & [unknown] | Ireland Under-19s v Kenya Under-19s | Gert Van Rensburg Stadium, Fochville | 1997/98 |
| 2 | 63 | WTS Porterfield (42) & EJG Morgan (44) | Ireland Under-19s v Canada Under-19s | MA Aziz Stadium, Chittagong | 2003/04 |
| 3 | 63 | PR Stirling (65) & A Balbirnie (20*) | Ireland Under-19s v Zimbabwe Under-19s | Nelson Park, Napier | 2009/10 |
| 9 | 62 | [unknown] & [unknown] | Ireland Under-19s v Denmark Under-19s | Christian Brothers College Old Boys Ground, Boksburg | 1997/98 |
| 4 | 62 | DI Joyce (59) & RS Haire (23) | Ireland Under-19s v Netherlands Under-19s | Radella Cricket Grounds, Radella | 1999/00 |
| 3 | 62 | NJ O'Brien (21) & AR White (76) | Ireland Under-19s v Americas Under-19s | Radella Cricket Grounds, Radella | 1999/00 |
| 2 | 62 | FP McAllister (25) & EJG Morgan (28) | Ireland Under-19s v England Under-19s | Colombo Cricket Club Ground, Colombo | 2005/06 |