| Inns | HS |
| 214 | 48 | Australia Under-19s (2) v India Under-19s | MA Chidambaram Stadium, Chepauk, Chennai | 2024/25 |
| 213 | 46 | Australia Under-19s (1) v Pakistan Under-19s | Tasmania Cricket Association Ground, Hobart | 1981/82 |
| 207 | 47 | Australia Under-19s (1) v Pakistan Under-19s | Niaz Stadium, Hyderabad | 1980/81 |
| 199 | 42 | Australia Under-19s (2) v India Under-19s | Vellyani Agricultural College Ground, Thiruvananthapuram | 1993/94 |
| 199 | 49 | Australia Under-19s (2) v England Under-19s | Bankstown Oval, Sydney | 2002/03 |
| 173 | 25 | Australia Under-19s (1) v England Under-19s | Edgbaston, Birmingham | 1999 |
| 164 | 46 | Australia Under-19s (1) v England Under-19s | Jubilee Park, Frankston, Melbourne | 2002/03 |
| 157 | 40 | Australia Under-19s (1) v Sri Lanka Under-19s | Colombo Cricket Club Ground, Colombo | 1984/85 |
| 151 | 48 | Australia Young Cricketers (1) v England Young Cricketers | Melbourne Cricket Ground, Melbourne | 1978/79 |
| 142-8d | 33 | Australia Under-19s (2) v Sri Lanka Under-19s | Kingston Twin Ovals, Hobart | 2016/17 |
| 137 | 49 | Australia Young Cricketers (1) v England Young Cricketers | Trent Bridge, Nottingham | 1983 |
| 132 | 41 | Australia Under-19s (2) v New Zealand Under-19s | Carisbrook, Dunedin | 1992/93 |
| 127 | 43 | Australia Under-19s (2) v India Under-19s | Ian Healy Oval, Brisbane | 2025/26 |
| 116 | 38 | Australia Under-19s (2) v India Under-19s | Great Barrier Reef Arena, Mackay | 2025/26 |
| 104-6 | 33* | Australia Under-19s (2) v New Zealand Under-19s | Waitara Oval, Sydney | 1995/96 |
| 103-4 | 34* | Australia Under-19s (2) v Pakistan Under-19s | No 1 Sports Ground, Newcastle | 1997/98 |
| 98-4 | 32* | Australia Under-19s (2) v Sri Lanka Under-19s | Fletcher Park, Perth | 2000/01 |
| 95 | 29 | Australia Under-19s (2) v India Under-19s | MA Chidambaram Stadium, Chepauk, Chennai | 2024/25 |
| 87 | 33 | Australia Under-19s (1) v New Zealand Under-19s | Carisbrook, Dunedin | 1992/93 |
| 64-3 | 25* | Australia Young Cricketers (2) v England Young Cricketers | Kardinia Park, Geelong | 1989/90 |
| 56-1 | 21 | Australia Under-19s (2) v India Under-19s | MA Chidambaram Stadium, Chepauk, Madras | 1984/85 |
| 25-0 | 17* | Australia Under-19s (2) v Sri Lanka Under-19s | Lilac Hill Park, Perth | 2000/01 |
| 23-0 | 15* | Australia Under-19s (2) v India Under-19s | Deakin Reserve, Shepparton | 1986/87 |
| 23-0 | 17* | Australia Under-19s (2) v New Zealand Young Cricketers | Loxton North Oval, Loxton | 1988/89 |
| 15-0 | 13* | Australia Under-19s (2) v Sri Lanka Under-19s | St Peter's College, Adelaide | 2000/01 |
| 9-0 | 5* | Australia Young Cricketers (2) v England Young Cricketers | Grace Road, Leicester | 1991 |
