| 117 | MHW Papps | New Zealand Under-19s v England Under-19s | Pukekura Park, New Plymouth | 1998/99 |
| 123 | BB McCullum | New Zealand Under-19s v South Africa Under-19s | Molyneux Park, Alexandra | 2000/01 |
Note that some of the above players scored their hundred in the second innings and may have batted in the first