| Inns | HS |
| 380-9d | 81 | Australia Under-19s (1) v Sri Lanka Under-19s | Manuka Oval, Canberra | 1983/84 |
| 373 | 98 | Australia Under-19s (1) v India Under-19s | Deakin Reserve, Shepparton | 1986/87 |
| 370 | 78 | Australia Under-19s (1) v India Under-19s | MA Chidambaram Stadium, Chepauk, Madras | 1984/85 |
| 358 | 85 | Australia Under-19s (1) v Sri Lanka Under-19s | St Peter's College, Adelaide | 2000/01 |
| 346 | 84 | Australia Under-19s (1) v England Under-19s | Alan Pettigrew Oval, Brisbane | 2022/23 |
| 345 | 69 | Australia Young Cricketers (1) v England Young Cricketers | Western Australia Cricket Association Ground, Perth | 1989/90 |
| 324-9d | 68 | Australia Under-19s (2) v New Zealand Young Cricketers | Hagley Oval, Christchurch | 1986/87 |
| 313-9d | 91 | Australia Under-19s (2) v New Zealand Under-19s | Manuka Oval, Canberra | 1995/96 |
| 311-4 | 95* | Australia Under-19s (2) v India Under-19s | Wankhede Stadium, Bombay | 1993/94 |
| 308 | 75 | Australia Under-19s (2) v India Under-19s | Manuka Oval, Canberra | 1986/87 |
| 298 | 89 | Australia Under-19s (1) v New Zealand Under-19s | No 1 Sports Ground, Newcastle | 1995/96 |
| 297 | 82 | Australia Young Cricketers (1) v England Young Cricketers | North Marine Road, Scarborough | 1983 |
| 297 | 69 | Australia Under-19s (1) v New Zealand Under-19s | Waitara Oval, Sydney | 1995/96 |
| 297 | 59 | Australia Under-19s (2) v Pakistan Under-19s | National Stadium, Karachi | 1996/97 |
| 293 | 61 | Australia Under-19s (1) v India Under-19s | MA Chidambaram Stadium, Chepauk, Chennai | 2024/25 |
| 271 | 86 | Australia Young Cricketers (2) v England Young Cricketers | Trent Bridge, Nottingham | 1983 |
| 270 | 93 | Australia Under-19s (1) v India Under-19s | Wankhede Stadium, Bombay | 1993/94 |
| 269 | 65 | Australia Under-19s (2) v England Under-19s | St Peter's College, Adelaide | 2002/03 |
| 269-9d | 71 | Australia Under-19s (1) v Sri Lanka Under-19s | Sinhalese Sports Club Ground, Colombo | 2018/19 |
| 268 | 75 | Australia Under-19s (1) v New Zealand Young Cricketers | Manuka Oval, Canberra | 1985/86 |
| 268 | 64 | Australia Under-19s (1) v England Under-19s | Allan Border Field, Brisbane | 2022/23 |
| 262-8d | 87 | Australia Under-19s (2) v India Under-19s | McDonald Park, Mount Gambier | 1994/95 |
| 261-8 | 85 | Australia Young Cricketers (2) v West Indies Under-19s | Sabina Park, Kingston | 1990 |
| 261 | 72 | Australia Under-19s (2) v India Under-19s | Drummoyne Oval, Sydney | 1994/95 |
| 254 | 54 | Australia Under-19s (1) v New Zealand Under-19s | Manuka Oval, Canberra | 1995/96 |
| 252 | 97 | Australia Under-19s (1) v Pakistan Under-19s | National Stadium, Karachi | 1996/97 |
| 251-3d | 84 | Australia Under-19s (1) v New Zealand Young Cricketers | Pukekura Park, New Plymouth | 1986/87 |
| 243 | 92 | Australia Under-19s (1) v India Under-19s | Ian Healy Oval, Brisbane | 2025/26 |
| 238-6 | 81 | Australia Under-19s (1) v New Zealand Young Cricketers | Russell Lucas Oval, Melbourne | 1988/89 |
| 237 | 72 | Australia Under-19s (2) v Sri Lanka Under-19s | Colombo Cricket Club Ground, Colombo | 1984/85 |
