| Inns | HS |
| 295 | 45 | Australia Under-19s v Pakistan Under-19s | Mirpur Cricket Stadium, Mirpur | 2007/08 |
| 253-7 | 47* | Australia Under-19s v England Under-19s | Melbourne Cricket Ground, Melbourne | 2002/03 |
| 232-6 | 49 | Australia Under-19s v West Indies Under-19s | Dr YS Rajasekhara Reddy ACA-VDCA Cricket Stadium, Visakhapatnam | 2011/12 |
| 215 | 47 | Australia Young Cricketers v England Young Cricketers | County Ground, Derby | 1983 |
| 211 | 49 | Australia Under-19s v West Indies Under-19s | Dubai Sports City Stadium, Dubai | 2011 |
| 207-9 | 44 | Australia Under-19s v Pakistan Under-19s | Bert Sutcliffe Oval, Lincoln | 2009/10 |
| 206 | 46 | Australia Under-19s v Nepal Under-19s | University Sains Malaysia, Penang | 2007/08 |
| 203 | 40 | Australia Under-19s v Sri Lanka Under-19s | Sinhalese Sports Club Ground, Colombo | 2014/15 |
| 200 | 39 | Australia Under-19s v West Indies Under-19s | Carisbrook, Dunedin | 2001/02 |
| 198 | 39 | Australia Under-19s v Pakistan Under-19s | Sheikhupura Stadium, Sheikhupura | 2007/08 |
| 198 | 35 | Australia Under-19s v Sri Lanka Under-19s | Colombo Cricket Club Ground, Colombo | 2014/15 |
| 191-6 | 41* | Australia Under-19s v India Under-19s | Marrara Cricket Ground, Darwin | 2013 |
| 187-6 | 48 | Australia Under-19s v India Under-19s | Village Green, Sydney | 1994/95 |
| 186-9 | 36 | Australia Under-19s v Sri Lanka Under-19s | Bir Shrestha Shahid Captain Mohiuddin Jahangir Stadium, Rajshahi | 2003/04 |
| 184-5 | 47* | Australia Young Cricketers v England Young Cricketers | Trent Bridge, Nottingham | 1991 |
| 184 | 42 | Australia Under-19s v India Under-19s | Cricket Association Puducherry Siechem Ground, Puducherry | 2024/25 |
| 179 | 41 | Australia Under-19s v New Zealand Under-19s | Peter Burge Oval, Brisbane | 2019 |
| 177 | 32 | Australia Under-19s v Sri Lanka Under-19s | Adelaide Oval, Adelaide | 2000/01 |
| 176 | 39 | Australia Under-19s v India Under-19s | Cricket Association Puducherry Siechem Ground, Puducherry | 2024/25 |
| 172-6 | 46 | Australia Under-19s v India Under-19s | University Oval, Adelaide | 1986/87 |
| 172 | 36 | Australia Under-19s v Sri Lanka Under-19s | Penang Sports Club, Penang | 2007/08 |
| 169 | 44 | Australia Under-19s v New Zealand Under-19s | ICC Cricket Academy Ground No 2, Dubai | 2015/16 |
| 168 | 29 | Australia Under-19s v India Under-19s | Bellerive Oval, Hobart | 2008/09 |
| 167 | 32 | Australia Young Cricketers v Pakistan Young Cricketers | Mildura City Oval, Mildura | 1987/88 |
| 167 | 48* | Australia Under-19s v Pakistan Under-19s | Roy Henzell Oval, Caloundra | 2006/07 |
| 167 | 47 | Australia Under-19s v Sri Lanka Under-19s | Colts Cricket Club Ground, Colombo | 2013/14 |
| 163-7 | 41* | Australia Under-19s v Sri Lanka Under-19s | University Oval, Adelaide | 2000/01 |
| 162 | 35 | Australia Under-19s v South Africa Under-19s | Port Trust Golden Jubilee Stadium, Visakhapatnam | 2013/14 |
| 160 | 26 | Australia Under-19s v Sri Lanka Under-19s | Gardens Oval, Darwin | 2009/10 |
| 156-4 | 39 | Australia Under-19s v Sri Lanka Under-19s | Marrara Cricket Ground, Darwin | 2009/10 |
