This is the SACE Honour Roll, listing every award, merit or prize won by South Australian SACE students in 2019, along with their school and subject details.
The report also includes significant Australian national awards and prizes such as the Australian Student Prize.
| 596 | Lim, Yiing Fen (Jocelyn) | SA | Merit | Psychology | |
| 597 | Lin, Antonina Maria | SA | Merit | Chemistry | |
| 598 | Lin, Antonina Maria | SA | Merit | Physics | |
| 599 | Lin, Ben Jiayu | SA | Merit | Chemistry | |
| 600 | Lin, Ben Jiayu | SA | Merit | Physics | |
| 601 | Lin, Ben Jiayu | SA | Merit | Research Project B | |
| 602 | Lindsay, Teegan | SA | Merit | Business and Enterprise | |
| 603 | Liptak, Ruby Lou | SA | Merit | Research Project B | |
| 604 | Litip, Ameera | SA | Merit | English as an Additional Language | |
| 605 | Liu, Chuyao (Talia) | SA | Merit | Research Project B | |
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| 606 | Liu, Lucinda | SA | Merit | Biology | |
| 607 | Liu, Lucinda | SA | Merit | Chemistry | |
| 608 | Lochert, Tallulah Starr | SA | Merit | Research Project B | |
| 609 | Lock, Larissa | SA | Merit | Food and Hospitality | |
| 610 | Lockwood, Cameron | SA | Merit | Music Explorations | |
| 611 | Loechel, Tiana Grace | SA | Merit | Research Project B | |
| 612 | Lohana, Ayush | SA | Merit | Business and Enterprise | |
| 613 | Lohana, Ayush | SA | Merit | Research Project B | |
| 614 | Loprete, Matteo | SA | Merit | Visual Arts - Design | |
| 615 | Loprete, Samuel | SA | Merit | Communication Products I | |
| 616 | Losasso, Jake | SA | Merit | Media Studies | |
| 617 | Lovas-Tiong, Angela | SA | Merit | Mathematical Methods | |
| 618 | Lovat, Samuel Jackson | SA | Merit | Chemistry | |
| 619 | Lovat, Samuel Jackson | SA | Merit | Mathematical Methods | |
| 620 | Loveday, Lillian Jaye | SA | Merit | Drama | |
| 621 | Low, Ethan | SA | Merit | Chemistry | |
| 622 | Low, Ethan | SA | Merit | Mathematical Methods | |
| 623 | Lowe, Angelique Veronica | SA | Merit | Tourism | |
| 624 | Lowe, Harriette | SA | Merit | Biology | |
| 625 | Lowe, Harriette | SA | Merit | General Mathematics | |
| 626 | Lowe, Harriette | SA | Merit | Geography | |
| 627 | Lowe, Harriette | Wilderness School | Medindie | Prize: John Lewis Medal and Prize | Geography |
| 628 | Loy, Gabriella Rose | SA | Merit | Outdoor Education | |
| 629 | Lu, Brendan Qinghui | SA | Merit | Specialist Mathematics | |
| 630 | Lu, Jinyue | SA | Merit | Business and Enterprise | |
| 631 | Lucey, Sebastian George | SA | Merit | Food and Hospitality | |
| 632 | Luke, Isabella | SA | Merit | Research Project B | |
| 633 | Lumbers, Sofia | SA | Merit | Physical Education | |
| 634 | Luthra, Anchal | SA | Merit | Communication Products II | |
| 635 | Luthra, Anchal | SA | Merit | Visual Arts - Design | |
| 636 | Luu, Yasmin | SA | Merit | Research Project B | |
| 637 | Mackenzie, Charlotte | SA | Merit | Biology | |
| 638 | Mackenzie, Charlotte | SA | Merit | Mathematical Methods | |
| 639 | Mackenzie, Charlotte | SA | Merit | Specialist Mathematics | |
| 640 | Mackereth, Lily | SA | Merit | English | |
| 641 | Mackereth, Toby | SA | Merit | English | |
| 642 | Mackereth, Toby | SA | Merit | Modern History | |
| 643 | Macvicar, Andrea | SA | Merit | Research Project B | |
| 644 | Madike, Reema | SA | Merit | English | |
| 645 | Madike, Reema | SA | Merit | Geography | |