| 1151 | Zhang, Zitian | Peninsula International School Australia Malaysia Campus | Selangor, Malaysia | Mathematical Methods | 41 |
| 1152 | Zhao, Chenjie | Trinity Grammar School | Kew | Mathematical Methods | 44 |
| 1153 | Zhao, Jason | Scotch College | Hawthorn | Mathematical Methods | 40 |
| 1154 | Zhao, Wenxi | Shelford Girls Grammar | Caulfield | Mathematical Methods | 48 |
| 1155 | Zhao, Zhenanzhen | Melbourne Girls Grammar | South Yarra | Mathematical Methods | 40 |
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| 1156 | Zhao, Zixuan | Presbyterian Ladies College | Burwood | Mathematical Methods | 44 |
| 1157 | Zheng, Ethan | Huntingtower School | Mount Waverley | Mathematical Methods | 47 |
| 1158 | Zheng, Junyan | Melbourne Grammar School | Melbourne | Mathematical Methods | 40 |
| 1159 | Zheng, Sing Wang | Scotch College | Hawthorn | Mathematical Methods | 43 |
| 1160 | Zheng, William | Melbourne High School | South Yarra | Mathematical Methods | 40 |
| 1161 | Zheng, Zuo | Lowther Hall Anglican Grammar School | Essendon | Mathematical Methods | 41 |
| 1162 | Zhong, Jiaxuan | Presbyterian Ladies College | Burwood | Mathematical Methods | 45 |
| 1163 | Zhong, Sirui | Templestowe College | Templestowe Lower | Mathematical Methods | 43 |
| 1164 | Zhong, Yuqing | Presbyterian Ladies College | Burwood | Mathematical Methods | 46 |
| 1165 | Zhou, Chengyu | Bialik College | Hawthorn | Mathematical Methods | 46 |
| 1166 | Zhou, Eco | Yarra Valley Grammar School | Ringwood | Mathematical Methods | 42 |
| 1167 | Zhou, Isabella Yike | Methodist Ladies College | Kew | Mathematical Methods | 50 |
| 1168 | Zhou, Xiaoran | Nossal High School | Berwick | Mathematical Methods | 48 |
| 1169 | Zhou, Yixuan | Presbyterian Ladies College | Burwood | Mathematical Methods | 40 |
| 1170 | Zhu, Louisa | Penleigh and Essendon Grammar School | Keilor East | Mathematical Methods | 42 |
| 1171 | Zhu, Xingyu | Yarra Valley Grammar School | Ringwood | Mathematical Methods | 41 |
| 1172 | Zhu, Yifan | Melbourne High School | South Yarra | Mathematical Methods | 41 |
| 1173 | Zhu, Yilong | Scotch College | Hawthorn | Mathematical Methods | 44 |
| 1174 | Zia, Martina | Santa Maria College | Northcote | Mathematical Methods | 43 |
| 1175 | Zolotareva, Anna Petrovna | Kilvington Grammar School | Ormond | Mathematical Methods | 40 |
| 1176 | Zou, Justin | Melbourne High School | South Yarra | Mathematical Methods | 44 |
| 1177 | Zou, Zichuan | Camberwell Grammar School | Canterbury | Mathematical Methods | 44 |
| 1178 | Zukerman, Dion | Bialik College | Hawthorn | Mathematical Methods | 42 |
| 1179 | Zulkarnain, Zara Binti | John Monash Science School | Clayton | Mathematical Methods | 43 |