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.
| 641 | Lightfoot, Thomas Joseph | SA | Merit | Research Project B | |
| 642 | Likos, Samantha | SA | Merit | English | |
| 643 | Lillecrapp, Darcy Hugh | SA | Merit | Accounting | |
| 644 | Lim, Min Shen | SA | Merit | Mathematical Methods | |
| 645 | Lim, Paul | SA | Merit | Mathematical Methods | |
| 646 | Lim, Taehan | SA | Merit | English | |
| 647 | Lim, Taehan | SA | Merit | Physics | |
| 648 | Lim, Taehan | SA | Merit | Research Project B | |
| 649 | Lim, Zhi Yi | SA | Merit | English | |
| 650 | Lim, Zhi Yi | SA | Merit | Research Project B | |
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| 651 | Ling, Cornas | SA | Merit | Chemistry | |
| 652 | Ling, Cornas | SA | Merit | Physics | |
| 653 | Ling, Kevin Tek-Loong | SA | Merit | Chemistry | |
| 654 | Ling, Kevin Tek-Loong | SA | Merit | Research Project B | |
| 655 | Linke, Chelsea Rose | SA | Merit | Essential English | |
| 656 | Lipman, Sophie Grace | SA | Merit | Research Project B | |
| 657 | Liptak, Ruby | Westminster School | Marion | Gov of SA SACE Award | |
| 658 | Liptak, Ruby Lou | SA | Merit | English Literary Studies | |
| 659 | Liu, Ryan Yan | SA | Merit | Mathematical Methods | |
| 660 | Liu, Yuechen (Kristy) | SA | Merit | Specialist Mathematics | |
| 661 | Ljubicic, Sarah | SA | Merit | Biology | |
| 662 | Ljubicic, Sarah | SA | Merit | Chemistry | |
| 663 | Ljubicic, Sarah | SA | Merit | English | |
| 664 | Ljubicic, Sarah | SA | Merit | Psychology | |
| 665 | Llewellyn, Angus William | SA | Merit | Agricultural Production | |
| 666 | Loebell, Michael | SA | Merit | Digital Communication Solutions | |
| 667 | Loechel, Tiana Grace | SA | Merit | Information Processing and Publishing | |
| 668 | Lombard, Cara Erika | SA | Merit | Chemistry | |
| 669 | Long, Elise Maya | SA | Merit | Digital Communication Solutions | |
| 670 | Lovas-Tiong, Adelyn Jia Ying | SA | Merit | Research Project B | |
| 671 | Lovell, Haneulle | SA | Merit | Music Performance - Solo | |
| 672 | Lovell, Julian | SA | Merit | Industry and Entrepreneurial Solutions | |
| 673 | Lu, Brendan Qinghui | SA | Merit | Chemistry | |
| 674 | Lu, Brendan Qinghui | SA | Merit | Economics | |
| 675 | Lu, Brendan Qinghui | SA | Merit | English Literary Studies | |
| 676 | Lu, Jiaxu | SA | Merit | English as an Additional Language | |
| 677 | Lu, Xun | SA | Merit | Mathematical Methods | |
| 678 | Luong, Minh Dai | SA | Merit | Research Project A | |
| 679 | Luscombe, Harvey | SA | Merit | Workplace Practices | |
| 680 | Mackenzie, Chloe Margarita | SA | Merit | Mathematical Methods | |
| 681 | Mackenzie, Chloe Margarita | SA | Merit | Psychology | |
| 682 | Mackenzie, Rose Adelaide | SA | Merit | English | |
| 683 | Madigan, Stephanie | SA | Merit | Research Project B | |
| 684 | Maggs-Pearce, Lachlan Thomas | SA | Merit | Mathematical Methods | |
| 685 | Mahoney, William Jesse | SA | Merit | Integrated Learning A | |
| 686 | Malandris, Sophie | SA | Merit | English | |
| 687 | Malandris, Sophie | SA | Merit | Mathematical Methods | |
| 688 | Male, Abbey Louise | SA | Merit | Business and Enterprise | |
| 689 | Male, Abbey Louise | SA | Merit | General Mathematics | |
| 690 | Manavis, Helena Marie | SA | Merit | Research Project B | |