| Inns | HS |
| 269-9 | 97 | Scotland Under-19s v South Africa Under-19s | JB Marks Cricket Oval, Potchefstroom | 2023/24 |
| 251-6 | 76* | Scotland Under-19s v Namibia Under-19s | Willowmoore Park Main Oval, Benoni | 2023/24 |
| 250-3 | 71 | Scotland Under-19s v United Arab Emirates Under-19s | Witrand Cricket Field, Potchefstroom | 2019/20 |
| 241-7 | 58 | Scotland Under-19s v Zimbabwe Under-19s | Peter Burge Oval, Brisbane | 2012 |
| 236-8 | 54 | Scotland Under-19s v Australia Under-19s | Conaree Sports Club, Conaree | 2021/22 |
| 225 | 60 | Scotland Under-19s v Fiji Under-19s | Sheikh Kamal International Cricket Stadium No 2 Ground, Cox's Bazar | 2015/16 |
| 222-7 | 72 | Scotland Under-19s v Denmark Under-19s | Avion Park Cricket Club, Kempton Park | 1997/98 |
| 210 | 37 | Scotland Under-19s v Afghanistan Under-19s | Allan Border Field, Brisbane | 2012 |
| 209 | 72 | Scotland Under-19s v Papua New Guinea Under-19s | Sheikh Zayed Stadium Nursery 1, Abu Dhabi | 2013/14 |
| 208 | 65 | Scotland Under-19s v New Zealand Under-19s | John Blanck Oval, Maroochydore | 2012 |
| 205-9 | 57 | Scotland Under-19s v West Indies Under-19s | JB Marks Cricket Oval, Potchefstroom | 2023/24 |
| 204-7 | 67 | Scotland Under-19s v Nepal Under-19s | MA Aziz Stadium, Chittagong | 2003/04 |
| 202 | 45 | Scotland Under-19s v Kenya Under-19s | Soweto Cricket Oval, Soweto | 1997/98 |
| 200 | 59 | Scotland Under-19s v Pakistan Under-19s | Kev Hackney Oval, Maroochydore | 2012 |
| 186 | 76 | Scotland Under-19s v Sri Lanka Under-19s | R Premadasa Stadium, Colombo | 2005/06 |
| 185-5 | 47 | Scotland Under-19s v Ireland Under-19s | WEP Harris Oval, Brisbane | 2012 |
| 182 | 58 | Scotland Under-19s v Zimbabwe Under-19s | De Beers Diamond Oval, Kimberley | 2019/20 |
| 181 | 67 | Scotland Under-19s v Afghanistan Under-19s | John Blanck Oval, Maroochydore | 2012 |
| 181-9 | 32 | Scotland Under-19s v New Zealand Under-19s | Sheikh Kamal International Cricket Stadium No 2 Ground, Cox's Bazar | 2015/16 |
| 178 | 36 | Scotland Under-19s v Namibia Under-19s | Sheikh Zayed Stadium, Abu Dhabi | 2013/14 |
| 178 | 55 | Scotland Under-19s v Sri Lanka Under-19s | Everest Cricket Club Ground, Georgetown | 2021/22 |
| 174 | 48 | Scotland Under-19s v England Under-19s | JB Marks Cricket Oval, Potchefstroom | 2023/24 |
| 170 | 37 | Scotland Under-19s v Uganda Under-19s | Diego Martin Sporting Complex, Diego Martin | 2021/22 |
| 162 | 65 | Scotland Under-19s v Pakistan Under-19s | ICC Cricket Academy Ground No 2, Dubai | 2013/14 |
| 161-3 | 40* | Scotland Under-19s v Canada Under-19s | Melville Park, Auckland | 2001/02 |
| 159 | 39 | Scotland Under-19s v Namibia Under-19s | Sheikh Kamal International Cricket Stadium, Cox's Bazar | 2015/16 |
| 157 | 42 | Scotland Under-19s v Nepal Under-19s | Colin Maiden Park, Auckland | 2001/02 |
| 156 | 46 | Scotland Under-19s v Namibia Under-19s | Colombo Cricket Club Ground, Colombo | 2005/06 |
| 155-8 | 62 | Scotland Under-19s v India Under-19s | Bangabandhu National Stadium, Dhaka | 2003/04 |
| 152 | 59 | Scotland Under-19s v South Africa Under-19s | Nondescripts Cricket Club Ground, Colombo | 2005/06 |