| 13404 | Ong, Elysia | Yarra Valley Grammar School | Ringwood | English | 46 |
| 13405 | Ong, Grace Wing Ern | Balwyn High School | Balwyn North | Biology | 40 |
| 13406 | Ong, Kayla Kai Lyn | The Knox School | Wantirna South | English | 42 |
| 13407 | Ong, Leia Na Yeon | Ruyton Girls School | Kew | English | 40 |
| 13408 | Ong, Sebastian Wei Jet | Haileybury College | Keysborough | General Mathematics | 49 |
| 13409 | Ong, Sebastian Wei Jet | Haileybury College | Keysborough | English | 45 |
| 13410 | Ong, Stephanie | Glen Waverley Secondary College | Glen Waverley | Mathematical Methods | 44 |
| 13411 | Ong, Talia Madeline | Genazzano F.C.J. College | Kew | English | 41 |
| 13412 | Onggara, Witter | Scotch College | Hawthorn | Chemistry | 50 |
| 13413 | Onggara, Witter | Scotch College | Hawthorn | Literature | 50 |
| |
|||||
| 13414 | Onggara, Witter | Scotch College | Hawthorn | Languages: German | 47 |
| 13415 | Onggara, Witter | Scotch College | Hawthorn | Specialist Mathematics | 46 |
| 13416 | Ongkowardhana, Freyja Calista | Emmanuel College Melbourne | Altona North | Physics | 40 |
| 13417 | Onions, Lauren Josselin | Loreto Mandeville Hall | Toorak | Media | 40 |
| 13418 | Onley, Charity | Donvale Christian College | Donvale | Psychology | 41 |
| 13419 | Onn, Isaac James | Waverley Christian College Wantirna South | Wantirna South | Mathematical Methods | 40 |
| 13420 | Onslow, Lachlan Hugo | Carey Baptist Grammar School | Kew | General Mathematics | 40 |
| 13421 | Ooi, Anais Seeyue | Brentwood Secondary College | Glen Waverley | Biology | 47 |
| 13422 | Ooi, Zhi Chian | Peninsula International School Australia Malaysia Campus | Selangor, Malaysia | English as an Additional Language | 49 |
| 13423 | Ooi, Zhi Chian | Peninsula International School Australia Malaysia Campus | Selangor, Malaysia | General Mathematics | 41 |
| 13424 | Ooi, Zhi Chian | Peninsula International School Australia Malaysia Campus | Selangor, Malaysia | Business Management | 40 |
| 13425 | Oommen, Aaron | Balwyn High School | Balwyn North | General Mathematics | 44 |
| 13426 | Oommen, Aaron | Balwyn High School | Balwyn North | Chemistry | 41 |
| 13427 | Oommen, Aaron | Balwyn High School | Balwyn North | English Language | 41 |
| 13428 | Oon, You Jia Gavyn | Braybrook College | Braybrook | Psychology | 44 |
| 13429 | Oosthuizen, Sally-Grace Judith | Melbourne Girls College | Richmond | Biology | 45 |
| 13430 | Opie, Eve Marie | Mentone Grammar School | Mentone | Business Management | 49 |
| 13431 | Opie, Eve Marie | Mentone Grammar School | Mentone | Psychology | 45 |
| 13432 | Opie, Eve Marie | Mentone Grammar School | Mentone | Sociology | 43 |
| 13433 | Opie, Eve Marie | Mentone Grammar School | Mentone | English | 41 |
| 13434 | Orchard, Campbell | Mentone Grammar School | Mentone | Business Management | 40 |
| 13435 | Ord, Alicia Irene | Presbyterian Ladies College | Burwood | English | 50 |
| 13436 | Ord, Alicia Irene | Presbyterian Ladies College | Burwood | Biology | 45 |
| 13437 | Ord, Alicia Irene | Presbyterian Ladies College | Burwood | Economics | 45 |
| 13438 | Ord, Alicia Irene | Presbyterian Ladies College | Burwood | Chemistry | 43 |
| 13439 | Ord, Anouk Jasmine | Kardinia International College | Bell Post Hill | Art Creative Practice | 40 |
| 13440 | Ord, Anouk Jasmine | Kardinia International College | Bell Post Hill | Australian History | 40 |
| 13441 | Ord, Anouk Jasmine | Kardinia International College | Bell Post Hill | English | 40 |
| 13442 | Ording-Jespersen, Mila Teresa | Sandringham College | Sandringham | Psychology | 45 |
| 13443 | Orme, Evelyn Freda | Haileybury Girls College | Keysborough | General Mathematics | 45 |
| 13444 | Orr, Elizabeth Rania Russell | Geelong High School | East Geelong | Business Management | 45 |
| 13445 | Ortolan, Jai | St Peters College | Cranbourne | Physics | 50 |
| 13446 | Ortolan, Jai | St Peters College | Cranbourne | Engineering Studies (VCE VET) | 48 |
| 13447 | Ortolan, Jai | St Peters College | Cranbourne | General Mathematics | 46 |
| 13448 | Ortolan, Jai | St Peters College | Cranbourne | Specialist Mathematics | 41 |
| 13449 | Orwin, Aliyah Michelle | Mooroolbark College | Mooroolbark | General Mathematics | 50 |
| 13450 | Osagiede, David Oghosa | Gladstone Park Secondary College | Gladstone Park | English | 41 |
| 13451 | Osborne, Isobel Susan | Sacred Heart College Yarrawonga | Yarrawonga | Legal Studies | 43 |
| 13452 | Osborne, Isobel Susan | Sacred Heart College Yarrawonga | Yarrawonga | Psychology | 42 |
| 13453 | Osborne, James Alexander | Xavier College | Kew | Business Management | 44 |