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.
| 541 | Jung, Chan Hee | SA | Merit | Research Project B | |
| 542 | Jury, Daisy | Westminster School | Marion | Gov of SA SACE Award | |
| 543 | Kalamaras, Scarlett | SA | Merit | Information Processing and Publishing | |
| 544 | Kalyanasundaram, Kriti | SA | Merit | English | |
| 545 | Kang, Hoon | SA | Merit | Research Project B | |
| 546 | Kapoor, Arnav | SA | Merit | Psychology | |
| 547 | Karagiannis, Elleni | SA | Merit | Research Project B | |
| 548 | Karavasili, Theo-Charis | SA | Merit | Research Project B | |
| 549 | Karpathios, Alexandra | SA | Merit | Research Project B | |
| 550 | Kasehagen, Jesse | SA | Merit | Industry and Entrepreneurial Solutions | |
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| 551 | Kasimidou, Theodora | SA | Merit | Workplace Practices | |
| 552 | Katsabis, Elaina | SA | Merit | Food and Hospitality | |
| 553 | Katyal, Aryan | SA | Merit | English | |
| 554 | Katyal, Aryan | SA | Merit | Integrated Learning A | |
| 555 | Kaveberg, Savannah Sunni | SA | Merit | Research Project B | |
| 556 | Keene, Lili Grace Sparks | SA | Merit | Essential English | |
| 557 | Kehagias, Georgia | SA | Merit | Material Solutions | |
| 558 | Kehagias, Georgia | SA | Merit | Research Project B | |
| 559 | Kehagias, Georgia | Immanuel College | Novar Gardens | Gov of SA SACE Award | |
| 560 | Kemp, Allegra | SA | Merit | General Mathematics | |
| 561 | Kemp, Eva Grace | SA | Merit | Biology | |
| 562 | Kemp, Jeremy Stephen | SA | Merit | Research Project B | |
| 563 | Kempt, Mariel | SA | Merit | Information Processing and Publishing | |
| 564 | Kennedy, Mitchell | SA | Merit | Religion Studies | |
| 565 | Kennedy, Mitchell | SA | Merit | Specialist Mathematics | |
| 566 | Kennedy, Orlando | SA | Merit | English | |
| 567 | Kenning, Charlotte Hollie | SA | Merit | English | |
| 568 | Kenning, Charlotte Hollie | SA | Merit | Visual Arts - Art | |
| 569 | Keys, Sophia | SA | Merit | Ancient Studies | |
| 570 | Khanna, Shreyas | SA | Merit | English | |
| 571 | Kien, Minh Nhut | SA | Merit | English as an Additional Language | |
| 572 | Kien, Minh Nhut | SA | Merit | Mathematical Methods | |
| 573 | Kim, Do Hyun | SA | Merit | Workplace Practices A | |
| 574 | Kim, Eunsu | SA | Merit | Research Project B | |
| 575 | Kim, Yeeun | SA | Merit | Korean (Continuers) | |
| 576 | King, Edward Mayo | SA | Merit | Creative Arts | |
| 577 | Kingsland, Danielle Raye | SA | Merit | Food and Hospitality | |
| 578 | Kleemann, Jorjia | SA | Merit | Research Project B | |
| 579 | Klose, Jessica Lee | SA | Merit | English | |
| 580 | Kneebone, Alice | SA | Merit | Society and Culture | |
| 581 | Knight, Samuel John | SA | Merit | Biology | |
| 582 | Knight, Samuel John | SA | Merit | Research Project B | |
| 583 | Koch, Lily Grace | SA | Merit | Research Project B | |
| 584 | Koek, Tiffany Clare | SA | Merit | Health and Wellbeing | |
| 585 | Koh, Elliot Mun Hong | SA | Merit | General Mathematics | |
| 586 | Koh, Nicholas Shi-Wen | SA | Merit | Accounting | |
| 587 | Kohler, Macoy | SA | Merit | Research Project B | |
| 588 | Koijima, Konon | SA | Merit | General Mathematics | |
| 589 | Kolta, Kerelos Kolta | SA | Merit | General Mathematics | |
| 590 | Konopka, Mia Chanel | SA | Merit | Research Project B | |