This is the SACE Honour Roll, listing every award, merit or prize won by South Australian SACE students in 2009, along with their school and subject details.
The report also includes significant Australian national awards and prizes such as the Australian Student Prize.
| 719 | O'Connor, Lisa Kathryn | SA | Merit | Mathematical Applications | |
| 720 | Oliver, Amy Betty Lorraine | SA | Merit | Mathematical Applications | |
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| 721 | Olsson, Kyra Jean | SA | Merit | English Studies | |
| 722 | Orchard, Sophie Amelia Giles | SA | Merit | Health Studies | |
| 723 | Otto, Madeleine Louise | SA | Merit | English Studies | |
| 724 | Oulton, Jacinta Marie | SA | Merit | Psychology | |
| 725 | Overton, Luke Alexander | SA | Merit | Mathematical Applications | |
| 726 | Owen-Thomas, Joshua | SA | Merit | Physical Education | |
| 727 | Pacholski, Nicholas | SA | Merit | Systems and Control Products A | |
| 728 | Panayi-Motus, Alexandra Kate | SA | Merit | English Communications | |