| 12775 | Osman, Hudayfa | Sirius College Meadow Fair Campus | Broadmeadows | Visual Communication Design | 43 |
| 12776 | Osmanagic, Kaid | Taylors Lakes Secondary College | Taylors Lakes | Legal Studies | 43 |
| 12777 | Osmanagic, Kaid | Taylors Lakes Secondary College | Taylors Lakes | Psychology | 43 |
| 12778 | Osmond, Grace Eva | Box Hill High School | Box Hill | Psychology | 40 |
| 12779 | Osmond, Harrison Geoffrey | Trinity Grammar School | Kew | Accounting | 50 |
| 12780 | Osmond, Harrison Geoffrey | Trinity Grammar School | Kew | Specialist Mathematics | 47 |
| 12781 | Osmond, Harrison Geoffrey | Trinity Grammar School | Kew | English | 44 |
| 12782 | Osmond, Harrison Geoffrey | Trinity Grammar School | Kew | Geography | 43 |
| 12783 | Osmond, Harrison Geoffrey | Trinity Grammar School | Kew | Physics | 43 |
| 12784 | Ostrom, Tom Brian | Haileybury College | Keysborough | Business Management | 44 |
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| 12785 | Ostrowski, Sarah Angela | St Columbas College | Essendon | Business Management | 45 |
| 12786 | Ostrowski, Sarah Angela | St Columbas College | Essendon | Biology | 40 |
| 12787 | Othen, Ryan Derek | Xavier College | Kew | Physical Education | 41 |
| 12788 | Ottaway, Chelsea Rose | Mount Waverley Secondary College | Mount Waverley | Media | 44 |
| 12789 | Otteraa, Odin Michael | Bacchus Marsh Grammar | Bacchus Marsh | Further Mathematics | 46 |
| 12790 | Ottinger, Alexandra Irene | Eltham High School | Eltham | English | 41 |
| 12791 | Otto, Daniel James | Elisabeth Murdoch College | Langwarrin | Sport and Recreation (VCE VET) | 41 |
| 12792 | Otto, Sten-Eric | Albert Park College | Albert Park | English as an Additional Language | 47 |
| 12793 | Ottosson, Jodie Grace | Belgrave Heights Christian School | Belgrave Heights | Business Management | 42 |
| 12794 | Ottosson, Jodie Grace | Belgrave Heights Christian School | Belgrave Heights | English | 41 |
| 12795 | Ottosson, Jodie Grace | Belgrave Heights Christian School | Belgrave Heights | Studio Arts | 40 |
| 12796 | Ou, Xuan | Carey Baptist Grammar School | Kew | Mathematical Methods | 43 |
| 12797 | Ouano, Angel Ianne Labra | Koonung Secondary College | Mont Albert North | English | 43 |
| 12798 | Ouk, Angela | Killester College | Springvale | Philosophy | 40 |
| 12799 | Ould, Khye Matthew | Frankston High School | Frankston | Further Mathematics | 41 |
| 12800 | Ould, Khye Matthew | Frankston High School | Frankston | Health and Human Development | 41 |
| 12801 | Ould, Khye Matthew | Frankston High School | Frankston | History: Revolutions | 40 |
| 12802 | Oung, William | Melbourne High School | South Yarra | Mathematical Methods | 41 |
| 12803 | Oung, William | Melbourne High School | South Yarra | Chemistry | 40 |
| 12804 | Oung, William | Melbourne High School | South Yarra | English Language | 40 |
| 12805 | Ouyang, Jia | Camberwell High School | Canterbury | Further Mathematics | 40 |
| 12806 | Ouyang, Xiaolin | Vermont Secondary College | Vermont | Further Mathematics | 40 |
| 12807 | Ouyang, Zhengqin | Nossal High School | Berwick | Economics | 43 |
| 12808 | Oveisi, Danial | Balwyn High School | Balwyn North | Further Mathematics | 41 |
| 12809 | Oveisi, Danial | Balwyn High School | Balwyn North | Economics | 40 |
| 12810 | Oveisi, Danial | Balwyn High School | Balwyn North | History: Revolutions | 40 |
| 12811 | Ovenden Lloyd, Mae | Berwick Secondary College | Berwick | Psychology | 43 |
| 12812 | Overall, Harrison Hudson | Albert Park College | Albert Park | Psychology | 41 |
| 12813 | Owen, Hannah Grace | Mount Evelyn Christian School | Mount Evelyn | Business Management | 42 |
| 12814 | Owen, James Samuel | St Leonards College | Brighton East | Software Development | 42 |
| 12815 | Owen, Lila Grace | Mount Waverley Secondary College | Mount Waverley | Psychology | 49 |
| 12816 | Owen, Lila Grace | Mount Waverley Secondary College | Mount Waverley | Physical Education | 43 |
| 12817 | Owen, Molly | Frankston High School | Frankston | Further Mathematics | 41 |
| 12818 | Owen-Taylor, Lilika May | East Doncaster Secondary College | Doncaster East | Health and Human Development | 42 |
| 12819 | Owens, Ethan James | St Josephs College Geelong | Newtown | Physics | 48 |
| 12820 | Owens, Ethan James | St Josephs College Geelong | Newtown | Mathematical Methods | 42 |
| 12821 | Owens, Olivia Alice | Presbyterian Ladies College | Burwood | Geography | 42 |
| 12822 | Oxford, Ryan Liam | Padua College | Mornington | Visual Communication Design | 48 |
| 12823 | Oxley, Sophie Rose | Mentone Girls Grammar School | Mentone | Further Mathematics | 41 |
| 12824 | Ozkaya, Mahmut | Sirius College Meadow Fair Campus | Broadmeadows | Further Mathematics | 45 |