| 13193 | OOI, Jun Yoong Ivan | Melbourne High School | South Yarra | Software Development | 46 |
| 13194 | OOI, Laura Hui Li | Balwyn High School | Balwyn North | Food and Technology | 42 |
| 13195 | OP DE COUL, Crystal Jasmine | Warrnambool College | Warrnambool | Studio Arts | 40 |
| 13196 | OPALUCH, Hannah Mai | Frankston High School | Frankston | Business Management | 44 |
| 13197 | OPIE, Claudia Kathryn | Ballarat Grammar School | Wendouree | English | 42 |
| 13198 | OPRAY, Georgia Jane | Canterbury Girls Secondary College | Canterbury | Legal Studies | 40 |
| 13199 | ORCHARD, Joshua Francis | Point Cook Senior Secondary College | Point Cook | Outdoor and Environmental Studies | 40 |
| 13200 | ORDONA, Jarred Mark | Nossal High School | Berwick | Psychology | 44 |
| 13201 | ORELOWITZ, Zachari Adam | Bialik College | Hawthorn | English | 46 |
| 13202 | ORELOWITZ, Zachari Adam | Bialik College | Hawthorn | Studio Arts | 44 |
| |
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| 13203 | ORNSBY, Carla | Firbank Grammar School | Brighton | Health and Human Development | 46 |
| 13204 | ORNSBY, Carla | Firbank Grammar School | Brighton | English | 43 |
| 13205 | ORNSBY, Carla | Firbank Grammar School | Brighton | Business Management | 40 |
| 13206 | ORPIN, Chloe Louise | Yarra Valley Grammar School | Ringwood | Health and Human Development | 42 |
| 13207 | ORR, Alanah Jane | Geelong High School | East Geelong | English | 41 |
| 13208 | ORR, Clara Eliza | Ballarat Grammar School | Wendouree | Visual Communication Design | 41 |
| 13209 | ORRITT, Elizabeth Louise | Braemar College | Woodend | Health and Human Development | 43 |
| 13210 | ORSOLIC, Isabella | Emmaus College | Vermont South | Informatics | 48 |
| 13211 | ORSULIC, Alana Jelena | Academy of Mary Immaculate | Fitzroy | Health and Human Development | 44 |
| 13212 | ORSULIC, Alana Jelena | Academy of Mary Immaculate | Fitzroy | Legal Studies | 44 |
| 13213 | ORSULIC, Alana Jelena | Academy of Mary Immaculate | Fitzroy | Business Management | 41 |
| 13214 | ORTISI, Daniel | Marcellin College | Bulleen | Further Mathematics | 41 |
| 13215 | ORTON, Lilian May | Toorak College | Mount Eliza | Physical Education | 43 |
| 13216 | ORTON, Lilian May | Toorak College | Mount Eliza | English | 41 |
| 13217 | OSBORN, Eliza Kate | Catholic College Sale | Sale | Sport and Recreation (VCE VET) | 48 |
| 13218 | OSBORN, Eliza Kate | Catholic College Sale | Sale | Physical Education | 46 |
| 13219 | OSBORN, Eliza Kate | Catholic College Sale | Sale | Psychology | 45 |
| 13220 | OSBORN, Freddie | Scotch College | Hawthorn | Business Management | 43 |
| 13221 | OSBORNE, Emily | Eltham High School | Eltham | Further Mathematics | 40 |
| 13222 | OSBORNE, Emily Grace | Goulburn Valley Grammar School | Shepparton | Health and Human Development | 45 |
| 13223 | OSBORNE, Emily Grace | Goulburn Valley Grammar School | Shepparton | Legal Studies | 43 |
| 13224 | OSBORNE, Emily Grace | Goulburn Valley Grammar School | Shepparton | Psychology | 43 |
| 13225 | OSBORNE, Louis James | Warrnambool College | Warrnambool | Further Mathematics | 43 |
| 13226 | OSBORNE-RIGBY, Willow Georgia | Ballarat Clarendon College | Ballarat | Further Mathematics | 43 |
| 13227 | OSBORNE-RIGBY, Willow Georgia | Ballarat Clarendon College | Ballarat | English | 40 |
| 13228 | OSIANLIS, Dimitrios | Caulfield Grammar School Wheelers Hill | Wheelers Hill | Legal Studies | 45 |
| 13229 | OSIANLIS, Dimitrios | Caulfield Grammar School Wheelers Hill | Wheelers Hill | English | 44 |
| 13230 | OSIANLIS, Dimitrios | Caulfield Grammar School Wheelers Hill | Wheelers Hill | Business Management | 42 |
| 13231 | OSINSKI, Simon | Aquinas College | Ringwood | Physics | 40 |
| 13232 | OSMAN, Simona Ava | Ivanhoe Girls Grammar School | Ivanhoe | Physical Education | 42 |
| 13233 | OSTROWSKI, Isabelle Ines | Methodist Ladies College | Kew | Languages: French | 41 |
| 13234 | OSWALD, Matthew James | St Bedes College | Mentone | Health and Human Development | 40 |
| 13235 | OSWALD, Remington Lee | Shelford Girls Grammar | Caulfield | Drama | 45 |
| 13236 | OSWALD-JACOBS, Francesca Alexandra | Toorak College | Mount Eliza | Studio Arts | 45 |
| 13237 | OSWALD-JACOBS, Francesca Alexandra | Toorak College | Mount Eliza | Business Management | 44 |
| 13238 | OTIS, Aristotle | McKinnon Secondary College | McKinnon | English | 45 |
| 13239 | OTIS, Aristotle | McKinnon Secondary College | McKinnon | Further Mathematics | 43 |
| 13240 | OU, Daniel | Nossal High School | Berwick | Specialist Mathematics | 49 |
| 13241 | OU, Daniel | Nossal High School | Berwick | Accounting | 43 |
| 13242 | OU, Jijie Roy | Koonung Secondary College | Mont Albert North | English as an Additional Language | 41 |