| 13009 | O'Neil, Merrick Jackson | St Josephs College Geelong | Newtown | Psychology | 41 |
| 13010 | O'Neil, Merrick Jackson | St Josephs College Geelong | Newtown | Sport and Recreation (VCE VET) | 41 |
| 13011 | O'Neill, Tilly Jean | Eltham High School | Eltham | Literature | 46 |
| 13012 | O'Neill, Tilly Jean | Eltham High School | Eltham | Art Creative Practice | 42 |
| 13013 | O'Regan, Hayley Joan | Strathmore Secondary College | Strathmore | Chemistry | 44 |
| 13014 | O'Regan, Hayley Joan | Strathmore Secondary College | Strathmore | Mathematical Methods | 40 |
| 13015 | O'Reilly, Aidan Luke | Kambrya College | Berwick | Psychology | 42 |
| 13016 | O'Shaughnessy, Gilbert John | Balwyn High School | Balwyn North | Psychology | 50 |
| 13017 | O'Shaughnessy, Gilbert John | Balwyn High School | Balwyn North | Legal Studies | 48 |
| 13018 | O'Sullivan, Oskar Michael James | St Kevins College | Toorak | English | 46 |
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| 13019 | O'Sullivan, Sean Christopher | Trinity Grammar School | Kew | Psychology | 44 |
| 13020 | O'Sullivan, Sebastian Vincent | St Patricks College | Ballarat | English | 48 |
| 13021 | O'Sullivan, Sebastian Vincent | St Patricks College | Ballarat | Environmental Science | 47 |
| 13022 | O'Sullivan, Sebastian Vincent | St Patricks College | Ballarat | Biology | 46 |
| 13023 | O'Sullivan, Sebastian Vincent | St Patricks College | Ballarat | Religion and Society | 41 |
| 13024 | O'Sullivan, Sebastian Vincent | St Patricks College | Ballarat | Legal Studies | 40 |
| 13025 | O'Sullivan, Stella Violet | St Leonards College | Brighton East | Outdoor and Environmental Studies | 50 |
| 13026 | O'Sullivan, Stella Violet | St Leonards College | Brighton East | Health and Human Development | 45 |
| 13027 | O'Toole, Jack Albert | Victorian College of the Arts Secondary School | Southbank | Dance (VCE VET) | 50 |
| 13028 | Oakes, William | Frankston High School | Frankston | Outdoor and Environmental Studies | 40 |
| 13029 | Oaten, Ajuna Roach | Trinity Grammar School | Kew | Business Management | 42 |
| 13030 | Oaten, Ajuna Roach | Trinity Grammar School | Kew | General Mathematics | 41 |
| 13031 | Oaten, Marcus Andrew | Wesley College Glen Waverley | Glen Waverley | General Mathematics | 46 |
| 13032 | Oaten, Marcus Andrew | Wesley College Glen Waverley | Glen Waverley | Business Management | 41 |
| 13033 | Oates, Amy Rebecca | Bacchus Marsh Grammar | Bacchus Marsh | General Mathematics | 48 |
| 13034 | Oates, Cidney Evelina | Bacchus Marsh Grammar | Bacchus Marsh | Business Management | 41 |
| 13035 | Oates, Tali Villasanta | Gippsland Grammar | Sale | Media | 45 |
| 13036 | Oates, Tali Villasanta | Gippsland Grammar | Sale | Art Making and Exhibiting | 43 |
| 13037 | Oates, Tali Villasanta | Gippsland Grammar | Sale | Literature | 41 |
| 13038 | Obamwonyi, Mayah Gabrielle | Epping Secondary College | Epping | Sociology | 44 |
| 13039 | Obamwonyi, Mayah Gabrielle | Epping Secondary College | Epping | Health and Human Development | 40 |
| 13040 | Obeid, Noor | Hume Anglican Grammar | Mickleham | Art Making and Exhibiting | 40 |
| 13041 | Oberai, Zak | McKinnon Secondary College | McKinnon | General Mathematics | 42 |
| 13042 | Oberoi, Sanya | Huntingtower School | Mount Waverley | Geography | 40 |
| 13043 | Occhiuto, Anton Pierce | Salesian College Chadstone | Chadstone | General Mathematics | 48 |
| 13044 | Odgers, James Sirio | Billanook College | Mooroolbark | Music Performance (VCE VET) | 50 |
| 13045 | Ofoedu, Alexandra Chinwe | Suzanne Cory High School | Werribee | Psychology | 45 |
| 13046 | Ogawa Javes, Naoko | Melbourne Girls College | Richmond | English | 41 |
| 13047 | Ogawa Javes, Naoko | Melbourne Girls College | Richmond | Physics | 41 |
| 13048 | Ogden, Cooper Trent | Marcellin College | Bulleen | Biology | 43 |
| 13049 | Oghanna, Sara | St Monicas College | Epping | English | 44 |
| 13050 | Oghanna, Sara | St Monicas College | Epping | Psychology | 40 |
| 13051 | Oghanna, Yosip | Ivanhoe Grammar School Plenty | Doreen | Psychology | 46 |
| 13052 | Oghanna, Yosip | Ivanhoe Grammar School Plenty | Doreen | Chemistry | 40 |
| 13053 | Oguntade, Sharon Temiloluwa | Goulburn Valley Grammar School | Shepparton | Languages: Indonesian Second Language | 41 |
| 13054 | Oh, Abigail Shen-Ai | Ashwood High School | Ashwood | English | 42 |
| 13055 | Oh, Jayden Kay Hern | Balwyn High School | Balwyn North | Biology | 46 |
| 13056 | Oh, Jayden Kay Hern | Balwyn High School | Balwyn North | English Language | 43 |
| 13057 | Oh, Mia Caitlin | Waverley Christian College Wantirna South | Wantirna South | Visual Communication Design | 45 |
| 13058 | Oh, Seungmin | Melbourne High School | South Yarra | Accounting | 50 |