This is the SACE Honour Roll, listing every award, merit or prize won by South Australian SACE students in 2021, along with their school and subject details.
The report also includes significant Australian national awards and prizes such as the Australian Student Prize.
| 817 | Nguyen, Tiffanii Bao-Ngoc | SA | Merit | Research Project B | |
| 818 | Nguyen, Trung-Hieu | SA | Merit | Essential English | |
| 819 | Nguyen, Trung-Hieu | SA | Merit | Health and Wellbeing | |
| 820 | Nguyen, Vanessa | SA | Merit | Research Project B | |
| 821 | Ni, Alex | SA | Merit | Chemistry | |
| 822 | Nichols, Amelie Eve | SA | Merit | English | |
| 823 | Ninio, Jeremy Frank | SA | Merit | Digital Technologies | |
| 824 | Nitschke, William James | SA | Merit | English | |
| 825 | Nixon, Genevieve Bridget | SA | Merit | Dance | |
| 826 | Nixon, Genevieve Bridget | SA | Merit | Research Project B | |
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| 827 | Nkombera, Evelline Akonkwa | SA | Merit | Health and Wellbeing | |
| 828 | Noonan, Annie | SA | Merit | General Mathematics | |
| 829 | Norman, Sophie | SA | Merit | Music Performance - Ensemble | |
| 830 | Noutz, Imogen Cate | SA | Merit | English Literary Studies | |
| 831 | Noutz, Imogen Cate | SA | Merit | Psychology | |
| 832 | Nunn, Zoe | SA | Merit | Research Project B | |
| 833 | O'Callaghan, Lauren Grace | SA | Merit | English Literary Studies | |
| 834 | O'Connell, Grainne Anneke | SA | Merit | Psychology | |
| 835 | O'Connor, Ella Mary Maeve | SA | Merit | Biology | |
| 836 | O'Connor, Ella Mary Maeve | SA | Merit | Nutrition | |
| 837 | O'Dwyer, Paige | SA | Merit | Integrated Learning A | |
| 838 | O'Reardon, Harriet | SA | Merit | Child Studies | |
| 839 | O'Reardon, Harriet | SA | Merit | Society and Culture | |
| 840 | O'Rielly, Tahlia | SA | Merit | Dance | |
| 841 | O'Shannessy, Riley | SA | Merit | Research Project B | |
| 842 | Oberdan, Dana Gina | SA | Merit | Chemistry | |
| 843 | Oberdan, Dana Gina | SA | Merit | English | |
| 844 | Oehler, Josephine | SA | Merit | Chemistry | |
| 845 | Oehler, Josephine | SA | Merit | English | |
| 846 | Olafsen, Samuel | SA | Merit | General Mathematics | |
| 847 | Oldfield, Thomas James | SA | Merit | English | |
| 848 | Olijnyk, Marina | SA | Merit | Music Performance - Solo | |
| 849 | Ong, Gavin Michael | SA | Merit | Research Project B | |
| 850 | Ong, Leon Chong Shin | SA | Merit | Outdoor Education | |
| 851 | Organ, Caitlin Rose | SA | Merit | Psychology | |
| 852 | Orsillo, Lillian | SA | Merit | Legal Studies | |
| 853 | Orsillo, Lillian | Sacred Heart College | Somerton Park | Gov of SA SACE Award | |
| 854 | Otsuka, Hinako | SA | Merit | Japanese (Continuers) | |
| 855 | Ouyang, Sihui | SA | Merit | Food and Hospitality | |
| 856 | Owen, Braden Phillip | SA | Merit | Research Project B | |
| 857 | Oxford, Hannah Rose Marie | SA | Merit | Society and Culture | |
| 858 | Oxlad, Ryan David | SA | Merit | Industry and Entrepreneurial Solutions | |
| 859 | Oxlad, Ryan David | SA | Merit | Research Project B | |
| 860 | Page, Nikita | Wilderness School | Medindie | Gov of SA SACE Award | |
| 861 | Page, Nikita Lillian | SA | Merit | Mathematical Methods | |
| 862 | Page, Nikita Lillian | SA | Merit | Specialist Mathematics | |
| 863 | Pannu, Mansher Singh | SA | Merit | Research Project B | |
| 864 | Pant, Aashna | SA | Merit | General Mathematics | |
| 865 | Papageorgiou, Vasili | SA | Merit | Research Project B | |
| 866 | Paramasivam, Sahithya | SA | Merit | Research Project B | |