| 1 | Aba, Ayden | SA | Merit | Mathematical Studies | |
| 2 | Aba, Ayden | SA | Merit | Physics | |
| 3 | Aba, Ayden | SA | Merit | Specialist Mathematics | |
| 4 | Abernethy, Imogen | SA | Merit | Vocational Studies B | |
| 5 | Abeysekera, Rajitha Eroshan | SA | Merit | Creative Arts | |
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| 6 | Abrahamson, Drew Peter | SA | Merit | Visual Arts - Arts | |
| 7 | Affolter, Molly | SA | Merit | Workplace Practices | |
| 8 | Ahrens, Lachlan Benjamin | SA | Merit | Musicianship | |
| 9 | Alanne, Anjelica | SA | Merit | Mathematical Applications | |
| 10 | Albanese, Chantelle | SA | Merit | Legal Studies | |
| 11 | Albanese, Chantelle | SA | Merit | Research Project B | |
| 12 | Althorpe, Caleb Henry | SA | Merit | Physics | |
| 13 | Aluthwala, Oshadha Udara | SA | Merit | Biology | |
| 14 | Amberg, Benjamin | Marryatville High School | Marryatville | Australian Student Prize | |
| 15 | Amberg, Benjamin James | SA | Merit | Biology | |
| 16 | Amberg, Benjamin James | SA | Merit | Chemistry | |
| 17 | Amberg, Benjamin James | SA | Merit | Mathematical Methods | |
| 18 | Amberg, Benjamin James | SA | Merit | Research Project B | |
| 19 | Ambrosi, Christina Carla | SA | Merit | Society and Culture | |
| 20 | Andresen, Luke | SA | Merit | Solo Performance | |
| 21 | Andreula, Olivia | SA | Merit | Research Project B | |
| 22 | Andreula, Olivia | SA | Merit | Society and Culture | |
| 23 | Ang, James | SA | Merit | English Communications | |
| 24 | Ang, James | SA | Merit | Research Project B | |
| 25 | Angelakis, Nikita | SA | Merit | Mathematical Applications | |