| Inns | HS |
| 210 | 37 | Scotland Under-19s v Afghanistan Under-19s | Allan Border Field, Brisbane | 2012 |
| 202 | 45 | Scotland Under-19s v Kenya Under-19s | Soweto Cricket Oval, Soweto | 1997/98 |
| 185-5 | 47 | Scotland Under-19s v Ireland Under-19s | WEP Harris Oval, Brisbane | 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 |
| 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 |
| 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 |
| 149-8 | 31 | Scotland Under-19s v Sri Lanka Under-19s | Absa Puk Oval, Potchefstroom | 2019/20 |
| 145 | 29 | Scotland Under-19s v Uganda Under-19s | P Saravanamuttu Stadium, Colombo | 2005/06 |
| 140 | 19 | Scotland Under-19s v Ireland Under-19s | Sheikh Kamal International Cricket Stadium, Cox's Bazar | 2015/16 |
| 140 | 25 | Scotland Under-19s v Zimbabwe Under-19s | Queen's Park Oval, Port of Spain | 2021/22 |
| 127 | 29* | Scotland Under-19s v South Africa Under-19s | Sheikh Kamal International Cricket Stadium No 2 Ground, Cox's Bazar | 2015/16 |
| 125-5 | 40 | Scotland Under-19s v Kenya Under-19s | Carisbrook, Dunedin | 2001/02 |
| 119 | 23 | Scotland Under-19s v United Arab Emirates Under-19s | Sheikh Zayed Stadium, Abu Dhabi | 2013/14 |
| 115-3 | 30 | Scotland Under-19s v Papua New Guinea Under-19s | MA Aziz Stadium, Chittagong | 2003/04 |
| 112 | 32* | Scotland Under-19s v India Under-19s | R Premadasa Stadium, Colombo | 2005/06 |
| 110 | 21 | Scotland Under-19s v South Africa Under-19s | Fanie du Toit Sports Complex, Potchefstroom | 1997/98 |
| 110-4 | 39* | Scotland Under-19s v Papua New Guinea Under-19s | ICC Cricket Academy Ground, Dubai | 2013/14 |
| 106 | 24 | Scotland Under-19s v Australia Under-19s | Carisbrook, Dunedin | 2001/02 |
| 106 | 41 | Scotland Under-19s v Bangladesh Under-19s | Chittagong Divisional Stadium, Chittagong | 2003/04 |
| 103 | 21 | Scotland Under-19s v India Under-19s | Lenasia Stadium, Johannesburg | 1997/98 |
| 101 | 37 | Scotland Under-19s v West Indies Under-19s | Carisbrook, Dunedin | 2001/02 |
| 95 | 42 | Scotland Under-19s v Bangladesh Under-19s | Fatullah Khan Saheb Osmani Stadium, Fatullah | 2003/04 |
| 95 | 43 | Scotland Under-19s v West Indies Under-19s | Warner Park, Basseterre | 2021/22 |
| 89 | 28 | Scotland Under-19s v Bangladesh Under-19s | Witrand Cricket Field, Potchefstroom | 2019/20 |
| 88 | 44 | Scotland Under-19s v India Under-19s | Dubai Sports City Stadium, Dubai | 2013/14 |