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.
| 668 | Long, Madelyn | SA | Merit | Creative Arts | |
| 669 | Lord, Alastair | SA | Merit | English | |
| 670 | Lorraine, Sophie | SA | Merit | Research Project B | |
| 671 | Lowe, Troy Nathan | SA | Merit | Essential English | |
| 672 | Lowman, Archer | SA | Merit | Modern History | |
| 673 | Luke, Sophie | SA | Merit | Business Innovation | |
| 674 | Lunau, Noah Mitchell | SA | Merit | Chemistry | |
| 675 | Lunau, Noah Mitchell | SA | Merit | Physics | |
| 676 | Lunau, Noah Mitchell | SA | Merit | Research Project B | |
| 677 | Lupoi, Sonia | SA | Merit | Research Project B | |
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| 678 | Luraschi, Elah-Daisy Grace | SA | Merit | English | |
| 679 | Luraschi, Elah-Daisy Grace | SA | Merit | Visual Arts - Art | |
| 680 | Luscombe, Clancy | SA | Merit | Workplace Practices | |
| 681 | Lust, Clarisse Elise | SA | Merit | General Mathematics | |
| 682 | Lust, Clarisse Elise | SA | Merit | Psychology | |
| 683 | Lust, Clarisse Elise | SA | Merit | Society and Culture | |
| 684 | Ly, Jennifer | SA | Merit | Chemistry | |
| 685 | Ly, Jennifer | SA | Merit | Psychology | |
| 686 | Ly, Jennifer | SA | Merit | Research Project B | |
| 687 | Lynch, Charles | SA | Merit | English | |
| 688 | MacDonald, Abby-Rose | SA | Merit | Health and Wellbeing | |
| 689 | MacH, Kevin | SA | Merit | English | |
| 690 | Mackay, Chloe Elizabeth | SA | Merit | Interdisciplinary Learning and the Community | |
| 691 | Mackenzie, Ada | SA | Merit | Research Project B | |
| 692 | Mackenzie, Tavish | SA | Merit | Integrated Learning A | |
| 693 | Macleod, Juliet Kathryn | SA | Merit | Research Project B | |
| 694 | Madden, Sean | SA | Merit | Material Solutions | |
| 695 | Maddren, Bowen | SA | Merit | Research Project B | |
| 696 | Madigan, Daisy | SA | Merit | Workplace Practices | |
| 697 | Maerschel, Portia | SA | Merit | Physical Education | |
| 698 | Magiarapis, Amelia Kate | SA | Merit | Research Project B | |
| 699 | Magnus, Jasmine | SA | Merit | Workplace Practices | |
| 700 | Mah, Vivian | SA | Merit | Research Project B | |
| 701 | Maiello, Ellen Grace | SA | Merit | Physical Education | |
| 702 | Maier, Daniel Joseph | SA | Merit | Research Project B | |
| 703 | Mair, Taras Warren | SA | Merit | Research Project B | |
| 704 | Makki, Ali | SA | Merit | Biology | |
| 705 | Malhotra, Kabir | SA | Merit | Research Project B | |
| 706 | Man, Kristopher Nelson | SA | Merit | Music Studies | |
| 707 | Manavis, Helena Marie | SA | Merit | English | |
| 708 | Manguera, Princess Katrina Manalili | SA | Merit | Society and Culture | |
| 709 | Manifold, Annabel Elizabeth | SA | Merit | Physical Education | |
| 710 | Manifold, Annabel Elizabeth | SA | Merit | Research Project B | |
| 711 | Marafioti, Isaac | SA | Merit | Psychology | |
| 712 | Marciano, Alexander Lewis | SA | Merit | Mathematical Methods | |
| 713 | Marciano, Alexander Lewis | SA | Merit | Specialist Mathematics | |
| 714 | Marcinkowski, Ashley | SA | Merit | Research Project B | |
| 715 | Markou, Milla | SA | Merit | Research Project B | |
| 716 | Marlow, Monique Lara | SA | Merit | English | |
| 717 | Maronich, Milla Stephanie | SA | Merit | Nutrition | |