| 12947 | O'KEEFE, Elise Genevieve | Strathcona Girls Grammar School | Canterbury | Further Mathematics | 43 |
| 12948 | O'KEEFE, Elise Genevieve | Strathcona Girls Grammar School | Canterbury | English | 41 |
| 12949 | O'LEARY, Kathleen Margaret | Our Lady of Sacred Heart College | Bentleigh | Biology | 40 |
| 12950 | O'LEARY, Renee Johanna | Kilvington Grammar School | Ormond | Psychology | 44 |
| 12951 | O'LEARY, Renee Johanna | Kilvington Grammar School | Ormond | Biology | 43 |
| 12952 | O'LEARY, Renee Johanna | Kilvington Grammar School | Ormond | English | 41 |
| 12953 | O'LEARY, Sophie Isabelle | Sacred Heart College Geelong | Newtown | Health and Human Development | 42 |
| 12954 | O'MAHONY, Jack Justin | Notre Dame College | Shepparton | Psychology | 41 |
| 12955 | O'MAHONY-HOLMES, Georgina Ethel Rose | Lowther Hall Anglican Grammar School | Essendon | English | 46 |
| 12956 | O'MAHONY-HOLMES, Georgina Ethel Rose | Lowther Hall Anglican Grammar School | Essendon | Biology | 42 |
| |
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| 12957 | O'MAHONY-HOLMES, Georgina Ethel Rose | Lowther Hall Anglican Grammar School | Essendon | Chemistry | 42 |
| 12958 | O'MALLEY, Timothy Joseph | St Kevins College | Toorak | Mathematical Methods (CAS) | 42 |
| 12959 | O'MEARA, Lachlan James | Ballarat Grammar School | Wendouree | Systems Engineering | 41 |
| 12960 | O'MEARA, Liam John | St Kevins College | Toorak | English | 49 |
| 12961 | O'MEARA, Liam John | St Kevins College | Toorak | Ancient History | 43 |
| 12962 | O'MEARA, Liam John | St Kevins College | Toorak | Business Management | 41 |
| 12963 | O'MEARA, Ryan Thomas | Loyola College | Watsonia | Further Mathematics | 41 |
| 12964 | O'NEIL, Caitlin Grace | MacKillop Catholic Regional College | Werribee | Outdoor and Environmental Studies | 40 |
| 12965 | O'NEIL-DONNELLON, Charlotte | Loreto Mandeville Hall | Toorak | Art | 40 |
| 12966 | O'NEILL, Elyse Lauren | Padua College | Mornington | Art | 40 |
| 12967 | O'NEILL, Holly Olivia | Our Lady of Sacred Heart College | Bentleigh | Business Management | 42 |
| 12968 | O'NEILL, James Maitland Gordon | Waverley Christian College Wantirna South | Wantirna South | Further Mathematics | 44 |
| 12969 | O'NEILL, Samantha Elise | Yarra Valley Grammar School | Ringwood | Physical Education | 40 |
| 12970 | O'NEILL, Thomas Joseph Aymar | Melbourne Grammar School | Melbourne | Languages: French | 41 |
| 12971 | O'NEILL, Tyler James | Marcellin College | Bulleen | Informatics | 40 |
| 12972 | O'RAFFERTY, Elise | Catholic Regional College Sydenham | Sydenham | Religion and Society | 42 |
| 12973 | O'REILLY, Madison Paige | Lauriston Girls School | Armadale | English | 40 |
| 12974 | O'ROURKE, Declan Riley | Footscray City College | Footscray | Further Mathematics | 42 |
| 12975 | O'ROURKE, Declan Riley | Footscray City College | Footscray | Philosophy | 41 |
| 12976 | O'ROURKE, Georgia Emma | Sacre Coeur | Glen Iris | Mathematical Methods (CAS) | 40 |
| 12977 | O'SHANNESSY, Jim Douglas | Kambrya College | Berwick | Visual Communication Design | 40 |
| 12978 | O'SHANNESSY, Samuel John | Wangaratta High School | Wangaratta | Music Investigation | 44 |
| 12979 | O'SHEA, Alexander | Girton Grammar School | Bendigo | Environmental Science | 48 |
| 12980 | O'SHEA, Alexander | Girton Grammar School | Bendigo | English Language | 45 |
| 12981 | O'SHEA, Alexander | Girton Grammar School | Bendigo | Chemistry | 44 |
| 12982 | O'SHEA, Kate Ellen | Berwick Secondary College | Berwick | Health and Human Development | 41 |
| 12983 | O'SHEA, Mathilda Grace | Sacre Coeur | Glen Iris | Studio Arts | 40 |
| 12984 | O'SHEA, Ryan Paul | South Oakleigh College | Oakleigh South | Physics | 47 |
| 12985 | O'SHEA, Xavier Finley | St Patricks College | Ballarat | Further Mathematics | 41 |
| 12986 | O'SHEA-CARRE, Lucy May | Girton Grammar School | Bendigo | Sociology | 42 |
| 12987 | O'SULLIVAN, Ciara | Korowa Anglican Girls School | Glen Iris | Further Mathematics | 44 |
| 12988 | O'SULLIVAN, Ciara | Korowa Anglican Girls School | Glen Iris | Literature | 43 |
| 12989 | O'SULLIVAN, Ciara | Korowa Anglican Girls School | Glen Iris | Languages: German | 42 |
| 12990 | O'SULLIVAN, Eilis | Brauer College | Warrnambool | Psychology | 40 |
| 12991 | O'SULLIVAN, Emma Grace | Sacre Coeur | Glen Iris | Business Management | 43 |
| 12992 | O'SULLIVAN, Emma Grace | Sacre Coeur | Glen Iris | Australian History | 40 |
| 12993 | O'SULLIVAN, Georgia Rose | Star of the Sea College | Brighton | Literature | 49 |
| 12994 | O'SULLIVAN, Georgia Rose | Star of the Sea College | Brighton | Economics | 45 |
| 12995 | O'SULLIVAN, Georgia Rose | Star of the Sea College | Brighton | Global Politics | 45 |
| 12996 | O'SULLIVAN, Georgia Rose | Star of the Sea College | Brighton | Mathematical Methods (CAS) | 42 |