| Inns | HS |
| 354-8 | 90 | Zimbabwe Under-19s v Scotland Under-19s | De Beers Diamond Oval, Kimberley | 2019/20 |
| 291-7 | 65 | Zimbabwe Under-19s v Kenya Under-19s | Eden Park Outer Oval, Auckland | 2001/02 |
| 272-8 | 93 | Zimbabwe Under-19s v Canada Under-19s | MainPower Oval, Rangiora | 2017/18 |
| 267-9 | 70 | Zimbabwe Under-19s v South Africa Under-19s | Hollywoodbets Kingsmead, Durban | 2019/20 |
| 260 | 68 | Zimbabwe Under-19s v Ireland Under-19s | Harare Sports Club, Harare | 2024/25 |
| 259-4 | 74 | Zimbabwe Under-19s v Sri Lanka Under-19s | Bert Sutcliffe Oval, Lincoln | 2017/18 |
| 256-8 | 91 | Zimbabwe Under-19s v Sri Lanka Under-19s | Sinhalese Sports Club Ground, Colombo | 2005/06 |
| 256 | 58 | Zimbabwe Under-19s v Pakistan Under-19s | Witrand Cricket Field, Potchefstroom | 2019/20 |
| 256-4 | 77* | Zimbabwe Under-19s v West Indies Under-19s | Diego Martin Sporting Complex, Diego Martin | 2021/22 |
| 249 | 69 | Zimbabwe Under-19s v Australia Under-19s | Fanie du Toit Sports Complex, Potchefstroom | 1997/98 |
| 249 | 97 | Zimbabwe Under-19s v Papua New Guinea Under-19s | Endeavour Park, Townsville | 2012 |
| 248 | 78 | Zimbabwe Under-19s v Scotland Under-19s | Queen's Park Oval, Port of Spain | 2021/22 |
| 245-9 | 83 | Zimbabwe Under-19s v India Under-19s | Port Trust Golden Jubilee Stadium, Visakhapatnam | 2013/14 |
| 243-4 | 77 | Zimbabwe Under-19s v Ireland Under-19s | Harare Sports Club, Harare | 2024/25 |
| 241 | 59 | Zimbabwe Under-19s v Ireland Under-19s | St Catherine Club Ground, Bayfield | 2021/22 |
| 237-6 | 48* | Zimbabwe Under-19s v Ireland Under-19s | Harare Sports Club, Harare | 2024/25 |
| 236-5 | 67 | Zimbabwe Under-19s v West Indies Under-19s | Witrand Cricket Field, Potchefstroom | 1997/98 |
| 236-9 | 78 | Zimbabwe Under-19s v Namibia Under-19s | WEP Harris Oval, Brisbane | 2012 |
| 236-9 | 59 | Zimbabwe Under-19s v West Indies Under-19s | Peterhouse School, Marondera | 2017 |
| 236-9 | 56 | Zimbabwe Under-19s v Ireland Under-19s | Absa Puk Oval, Potchefstroom | 2023/24 |
| 236-8 | 44 | Zimbabwe Under-19s v Ireland Under-19s | Harare Sports Club, Harare | 2024/25 |
| 235-8 | 46 | Zimbabwe Under-19s v Hong Kong Under-19s | McLean Park, Napier | 2009/10 |
| 233-7 | 59 | Zimbabwe Under-19s v Namibia Under-19s | Galle International Stadium, Galle | 1999/00 |
| 228 | 72 | Zimbabwe Under-19s v Namibia Under-19s | Lincoln No 3, Lincoln | 2001/02 |
| 228 | 74 | Zimbabwe Under-19s v Australia Under-19s | Port Trust Golden Jubilee Stadium, Visakhapatnam | 2013/14 |
| 224 | 52 | Zimbabwe Under-19s v West Indies Under-19s | Zohur Ahmed Chowdhury Stadium, Chittagong | 2015/16 |
| 223 | 62 | Zimbabwe Under-19s v South Africa Under-19s | Harare Sports Club, Harare | 2010 |
| 223 | 68 | Zimbabwe Under-19s v Papua New Guinea Under-19s | WEP Harris Oval, Brisbane | 2012 |
| 221 | 45 | Zimbabwe Under-19s v South Africa Under-19s | Wally Wilson Oval, Rondebosch | 2016/17 |
| 220 | 53 | Zimbabwe Under-19s v South Africa Under-19s | Northerns-Goodwood Cricket Club Oval, Cape Town | 2010/11 |
