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.
| 630 | Lee, Seunga | SA | Merit | English as an Additional Language | |
| 631 | Lemire, Jessica Charlotte | SA | Merit | Dance | |
| 632 | Lemmings, Thomas Frederick Basil | SA | Merit | Research Project B | |
| 633 | Lennard, Chloe Louise | SA | Merit | Work and the Community | |
| 634 | Lennon, Dylan Matthew | SA | Merit | Accounting | |
| 635 | Leonardis, Lauren | SA | Merit | Health | |
| 636 | Leong, Yue Mann | SA | Merit | Health | |
| 637 | Leong, Yue Mann | SA | Merit | Psychology | |
| 638 | Lethbridge, Fiona | SA | Merit | General Mathematics | |
| 639 | Lewis, Amy Mae | SA | Merit | Business and Enterprise | |
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| 640 | Liew, Amy Jiahui | SA | Merit | English Literary Studies | |
| 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 | |
| 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 | |