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.
| 574 | Kim, Do Hyun | SA | Merit | Workplace Practices A | |
| 575 | Kim, Eunsu | SA | Merit | Research Project B | |
| 576 | Kim, Yeeun | SA | Merit | Korean (Continuers) | |
| 577 | King, Edward Mayo | SA | Merit | Creative Arts | |
| 578 | Kingsland, Danielle Raye | SA | Merit | Food and Hospitality | |
| 579 | Kleemann, Jorjia | SA | Merit | Research Project B | |
| 580 | Klose, Jessica Lee | SA | Merit | English | |
| 581 | Kneebone, Alice | SA | Merit | Society and Culture | |
| 582 | Knight, Samuel John | SA | Merit | Biology | |
| 583 | Knight, Samuel John | SA | Merit | Research Project B | |
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| 584 | Koch, Lily Grace | SA | Merit | Research Project B | |
| 585 | Koek, Tiffany Clare | SA | Merit | Health and Wellbeing | |
| 586 | Koh, Elliot Mun Hong | SA | Merit | General Mathematics | |
| 587 | Koh, Nicholas Shi-Wen | SA | Merit | Accounting | |
| 588 | Kohler, Macoy | SA | Merit | Research Project B | |
| 589 | Koijima, Konon | SA | Merit | General Mathematics | |
| 590 | Kolta, Kerelos Kolta | SA | Merit | General Mathematics | |
| 591 | Konopka, Mia Chanel | SA | Merit | Research Project B | |
| 592 | Kostich, Valen | SA | Merit | Mathematical Methods | |
| 593 | Kostich, Valen | SA | Merit | Research Project B | |
| 594 | Kostich, Valen | SA | Merit | Robotic and Electronic Systems | |
| 595 | Kramer, Bailey Lauren | SA | Merit | Outdoor Education | |
| 596 | Kroker, Imogen | SA | Merit | English | |
| 597 | Kuchel, Jake | SA | Merit | Industry and Entrepreneurial Solutions | |
| 598 | Kuchel, Jake | SA | Merit | Research Project B | |
| 599 | Kumar, Jeanquille Shanti Valerie | SA | Merit | Research Project B | |
| 600 | Kunninti, Praharshitha | SA | Merit | Research Project B | |
| 601 | Kvasniuk, Zachary | SA | Merit | Language and Culture | |
| 602 | Kyros, Kate | SA | Merit | Geography | |
| 603 | La, Ethan An Duy | SA | Merit | Chemistry | |
| 604 | La, Ethan An Duy | SA | Merit | Research Project B | |
| 605 | Lam, Caitlyn | SA | Merit | Chemistry | |
| 606 | Lam, Caitlyn | SA | Merit | English | |
| 607 | Lam, Caitlyn | SA | Merit | Psychology | |
| 608 | Lam, Lai-Yin | SA | Merit | Mathematical Methods | |
| 609 | Lamahewa, Thimitha | SA | Merit | Mathematical Methods | |
| 610 | Lamb, Bailey | SA | Merit | Research Project A | |
| 611 | Lamb, Jennifer Jean | SA | Merit | Psychology | |
| 612 | Lancaster, Sarah | SA | Merit | Research Project B | |
| 613 | Lane, Victoria Rose | SA | Merit | Physical Education | |
| 614 | Langfield, Bradley James | SA | Merit | Digital Technologies | |
| 615 | Langford, Ruby Grace | SA | Merit | Research Project B | |
| 616 | Larkin, Jack Raymond | SA | Merit | Research Project B | |
| 617 | Laverde, Juliana | SA | Merit | Biology | |
| 618 | Laverde, Juliana | SA | Merit | English Literary Studies | |
| 619 | Lawrence, Isaac Nicholas | SA | Merit | General Mathematics | |
| 620 | Lazarevich, Vasiliki | SA | Merit | Biology | |
| 621 | Lazarevich, Vasiliki | SA | Merit | English Literary Studies | |
| 622 | Lazarevich, Vasiliki | SA | Merit | French (Continuers) | |
| 623 | Le, Alexandra Anne | SA | Merit | Mathematical Methods | |