| 1151 | Yapa, Don Thimath Ranyuru | Goulburn Valley Grammar School | Shepparton | Mathematical Methods | 41 |
| 1152 | Yasab, Hemen | Penleigh and Essendon Grammar School | Keilor East | Mathematical Methods | 40 |
| 1153 | Yau, Dante Ryan | Kardinia International College | Bell Post Hill | Mathematical Methods | 49 |
| 1154 | Yau, Joshua Woan An | Melbourne High School | South Yarra | Mathematical Methods | 43 |
| 1155 | Yau, Long Hei Ciro | Yarra Valley Grammar School | Ringwood | Mathematical Methods | 45 |
| 1156 | Ye, Katherine Zihan | Melbourne Girls Grammar | South Yarra | Mathematical Methods | 44 |
| 1157 | Ye, Kevin | Melbourne High School | South Yarra | Mathematical Methods | 41 |
| 1158 | Ye, Putian | Wesley College Glen Waverley | Glen Waverley | Mathematical Methods | 44 |
| 1159 | Yee, Esther Zhi Jia | John Monash Science School | Clayton | Mathematical Methods | 45 |
| 1160 | Yeoh, Angus | Caulfield Grammar School Caulfield | St Kilda East | Mathematical Methods | 41 |
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| 1161 | Yeung, Yat | Yarra Valley Grammar School | Ringwood | Mathematical Methods | 42 |
| 1162 | Yin, Edison | Yarra Valley Grammar School | Ringwood | Mathematical Methods | 43 |
| 1163 | Yin, Mingchen | McKinnon Secondary College | McKinnon | Mathematical Methods | 41 |
| 1164 | Yin, Yue | Camberwell Girls Grammar School | Canterbury | Mathematical Methods | 43 |
| 1165 | Ying, Ruoshui | Viewbank College | Viewbank | Mathematical Methods | 41 |
| 1166 | Yip, Christian Zachary | Melbourne High School | South Yarra | Mathematical Methods | 44 |
| 1167 | Yoseph, Aminadab | Suzanne Cory High School | Werribee | Mathematical Methods | 46 |
| 1168 | Young, Raphael | Alphington Grammar School | Alphington | Mathematical Methods | 41 |
| 1169 | Younger, Lucas Dias | Caulfield Grammar School Caulfield | St Kilda East | Mathematical Methods | 45 |
| 1170 | Yousuf, Amina | Werribee Secondary College | Werribee | Mathematical Methods | 41 |
| 1171 | Yu, Kevin Yu Sen | Balwyn High School | Balwyn North | Mathematical Methods | 42 |
| 1172 | Yu, Lindy Lan | Presbyterian Ladies College | Burwood | Mathematical Methods | 48 |
| 1173 | Yu, Paolo | Melbourne High School | South Yarra | Mathematical Methods | 49 |
| 1174 | Yu, Rachael | Korowa Anglican Girls School | Glen Iris | Mathematical Methods | 40 |
| 1175 | Yu, Siyue | The Knox School | Wantirna South | Mathematical Methods | 50 |
| 1176 | Yu, Teresa Cabrera | MacRobertson Girls High School | Melbourne | Mathematical Methods | 43 |
| 1177 | Yu, Tyrus Reynard | Glen Waverley Secondary College | Glen Waverley | Mathematical Methods | 44 |
| 1178 | Yu, Weicheng | McKinnon Secondary College | McKinnon | Mathematical Methods | 40 |
| 1179 | Yu, Xiaolan | Korowa Anglican Girls School | Glen Iris | Mathematical Methods | 42 |
| 1180 | Yu, Zhihe | Ballarat Clarendon College | Ballarat | Mathematical Methods | 40 |
| 1181 | Yuan, Owen Yizhe | Camberwell Grammar School | Canterbury | Mathematical Methods | 42 |
| 1182 | Yuen, Hing Wai | Balwyn High School | Balwyn North | Mathematical Methods | 40 |
| 1183 | Zaman, Arsham | Haileybury College | Keysborough | Mathematical Methods | 40 |
| 1184 | Zamani, Archia | Scotch College | Hawthorn | Mathematical Methods | 43 |
| 1185 | Zappulla, Justin Lee | Box Hill High School | Box Hill | Mathematical Methods | 41 |
| 1186 | Zelada, Cesar Antonio | Mazenod College | Mulgrave | Mathematical Methods | 40 |
| 1187 | Zeng, De | Thomas Carr College Wenzhou No 21 Middle School | Wenzhou, China | Mathematical Methods | 41 |
| 1188 | Zeng, Yung Pan | Tintern Grammar | Ringwood East | Mathematical Methods | 41 |
| 1189 | Zhai, Fang Zhou Eric | Melbourne Grammar School | Melbourne | Mathematical Methods | 43 |
| 1190 | Zhan, Sheng | Trinity Grammar School | Kew | Mathematical Methods | 40 |
| 1191 | Zhang, Andrew | Brighton Grammar School | Brighton | Mathematical Methods | 40 |
| 1192 | Zhang, Dong Yue | John Monash Science School | Clayton | Mathematical Methods | 42 |
| 1193 | Zhang, Guanghou | Camberwell Grammar School | Canterbury | Mathematical Methods | 45 |
| 1194 | Zhang, Jason | Melbourne High School | South Yarra | Mathematical Methods | 47 |
| 1195 | Zhang, Jiahui | MacRobertson Girls High School | Melbourne | Mathematical Methods | 43 |
| 1196 | Zhang, Jing | Alphington Grammar School | Alphington | Mathematical Methods | 40 |
| 1197 | Zhang, Jinyuan | Yarra Valley Grammar School | Ringwood | Mathematical Methods | 46 |
| 1198 | Zhang, Kevin | Viewbank College | Viewbank | Mathematical Methods | 40 |
| 1199 | Zhang, Manyi | Korowa Anglican Girls School | Glen Iris | Mathematical Methods | 41 |
| 1200 | Zhang, Marissa | Yarra Valley Grammar School | Ringwood | Mathematical Methods | 40 |