This is the SACE Honour Roll, listing every award, merit or prize won by South Australian SACE students in 2020, along with their school and subject details.
The report also includes significant Australian national awards and prizes such as the Australian Student Prize.
| 850 | Noutz, Imogen Cate | SA | Merit | Research Project B | |
| 851 | Nycz, Natasha | SA | Merit | General Mathematics | |
| 852 | O'Callaghan, Lauren Grace | SA | Merit | Research Project B | |
| 853 | O'Dea, Anthony | SA | Merit | Research Project B | |
| 854 | O'Dea, Anthony | SA | Merit | Specialist Mathematics | |
| 855 | O'Dea, Lucy | SA | Merit | Psychology | |
| 856 | O'Hara, Luke | SA | Merit | English | |
| 857 | O'Leary, Amy | SA | Merit | English | |
| 858 | O'Leary, Amy | SA | Merit | Research Project B | |
| 859 | O'Loughlin, Jacinta | SA | Merit | Essential English | |
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| 860 | Oehler, Josephine | SA | Merit | Biology | |
| 861 | Oehler, Josephine | SA | Merit | Nutrition | |
| 862 | Olszewski, Nikki | SA | Merit | Child Studies | |
| 863 | Olszewski, Nikki | SA | Merit | Religion Studies | |
| 864 | Ong, Gavin Michael | SA | Merit | Mathematical Methods | |
| 865 | Onofrio, Ella | SA | Merit | Research Project B | |
| 866 | Ooi, Sean Xuan Ye | SA | Merit | Accounting | |
| 867 | Owens-Fleetwood, Kaelah | SA | Merit | General Mathematics | |
| 868 | Pabello, Yllor Abal | SA | Merit | Integrated Learning A | |
| 869 | Paddick (Mittal), Shaya Rose | SA | Merit | English | |
| 870 | Paddock, James Robert | SA | Merit | Material Solutions | |
| 871 | Paige, Felicity Jayne | SA | Merit | Agricultural Production | |
| 872 | Pain, Benjamin Jarrad | SA | Merit | Workplace Practices | |
| 873 | Palser, Zachary | SA | Merit | General Mathematics | |
| 874 | Palser, Zachary | SA | Merit | Legal Studies | |
| 875 | Panozzo, Jennifer Hazel | SA | Merit | English | |
| 876 | Paparella, Jordyn Tarquin | SA | Merit | Research Project B | |
| 877 | Papas, Elli | SA | Merit | General Mathematics | |
| 878 | Paranavithana, Shania | SA | Merit | English | |
| 879 | Pardo Teruel, Carolina | SA | Merit | Spanish (Continuers) | |
| 880 | Parhas, Panae | SA | Merit | Psychology | |
| 881 | Parisotto, Alana | SA | Merit | Specialist Mathematics | |
| 882 | Parker, Angus Noah | SA | Merit | Visual Arts - Design | |
| 883 | Parker, Ruby | SA | Merit | Psychology | |
| 884 | Patching, Bernadette | SA | Merit | Legal Studies | |
| 885 | Patel, Hriday | SA | Merit | Biology | |
| 886 | Patel, Hriday | SA | Merit | Mathematical Methods | |
| 887 | Paterson-Cleary, Mackenzie | SA | Merit | Psychology | |
| 888 | Patiniotis, Chloe Jade | SA | Merit | Research Project B | |
| 889 | Patsouris, Angelique Olympia | SA | Merit | English | |
| 890 | Paul, Sian | SA | Merit | Research Project B | |
| 891 | Paull, Mckenna William | SA | Merit | Psychology | |
| 892 | Pearce, Zacharia | SA | Merit | Research Project B | |
| 893 | Pearl, Lily | SA | Merit | Research Project B | |
| 894 | Pearson-Mckenzie, Jade | SA | Merit | Biology | |
| 895 | Pearson-Mckenzie, Jade | SA | Merit | Psychology | |
| 896 | Pedler, Teagan Shae | SA | Merit | General Mathematics | |
| 897 | Pedler, Teagan Shae | SA | Merit | Psychology | |
| 898 | Penberthy, Sophie | Pulteney Grammar School | Adelaide | Prize: John Lewis Medal and Prize | Geography |
| 899 | Penberthy, Sophie Toula | SA | Merit | Geography | |