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.
| 431 | Hansberry, Millah Rose | SA | Merit | Material Solutions | |
| 432 | Hansen, Ryley Cameron | SA | Merit | General Mathematics | |
| 433 | Haracic, Danny | SA | Merit | Mathematical Methods | |
| 434 | Hardwarewala, Hussain | SA | Merit | Integrated Learning A | |
| 435 | Harris, Mia Mae | SA | Merit | Psychology | |
| 436 | Harris, Thomas | SA | Merit | English Literary Studies | |
| 437 | Hart, Annabel Rose | SA | Merit | Mathematical Methods | |
| 438 | Harvey, Ashleigh | SA | Merit | General Mathematics | |
| 439 | Hastings, Abbey | SA | Merit | Visual Arts - Design | |
| 440 | Hauptman, Emma | SA | Merit | Research Project B | |
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| 441 | Hayes, Bethany Jane | SA | Merit | Research Project B | |
| 442 | Haynes, Mia | SA | Merit | Psychology | |
| 443 | Hayward-Johnson, Mitch | SA | Merit | English | |
| 444 | Hebberman, Ella Jane | SA | Merit | English | |
| 445 | Hegedus, Isaac | SA | Merit | General Mathematics | |
| 446 | Heidari, Ida | SA | Merit | Research Project B | |
| 447 | Heidari, Navah | SA | Merit | General Mathematics | |
| 448 | Henderson, Chloe | Salisbury High School | Salisbury North | Gov of SA Aboriginal Student SACE Award | |
| 449 | Henderson, Chloe | Salisbury High School | Salisbury North | Gov of SA SACE Award | |
| 450 | Henkel, Justin Paul | SA | Merit | Research Project B | |
| 451 | Highcock, Mason | SA | Merit | Material Solutions | |
| 452 | Hill, Annabelle | SA | Merit | Ancient Studies | |
| 453 | Hill, Jack Samuel | SA | Merit | Digital Communication Solutions | |
| 454 | Hinton, Alexandra Jane | SA | Merit | Psychology | |
| 455 | Hislop, Emma | SA | Merit | Research Project B | |
| 456 | Hislop, Emma | Eynesbury Senior College | Adelaide | Gov of SA SACE Award | |
| 457 | Hislop, Tara | SA | Merit | English Literary Studies | |
| 458 | Ho, Alanna Ying-Yi | SA | Merit | Research Project B | |
| 459 | Ho, Brendan Jun-Xiong | SA | Merit | Chemistry | |
| 460 | Ho, Brendan Jun-Xiong | SA | Merit | Mathematical Methods | |
| 461 | Ho, Brendan Jun-Xiong | SA | Merit | Research Project B | |
| 462 | Ho, Tran Yen Phi | SA | Merit | Vietnamese (Background Speakers) | |
| 463 | Hodges, Carl Thomas | SA | Merit | Chemistry | |
| 464 | Hodges, Carl Thomas | SA | Merit | English | |
| 465 | Hodges, Carl Thomas | SA | Merit | Research Project B | |
| 466 | Hodgkiss-Roberts, Kara | SA | Merit | English | |
| 467 | Hodgkiss-Roberts, Kara | SA | Merit | Society and Culture | |
| 468 | Hogan, Lucy | SA | Merit | General Mathematics | |
| 469 | Hohn, Hannah | SA | Merit | Outdoor Education | |
| 470 | Holland, Adam James | SA | Merit | Research Project B | |
| 471 | Holroyd, Mia | SA | Merit | Research Project B | |
| 472 | Honeychurch, Tahlia | SA | Merit | Integrated Learning A | |
| 473 | Hong, Trinity | SA | Merit | Research Project B | |
| 474 | Hosking, Thomas David | SA | Merit | Chemistry | |
| 475 | Hosking, Thomas David | SA | Merit | Mathematical Methods | |
| 476 | Hosking, Thomas David | SA | Merit | Physics | |
| 477 | Huang, Dinih | SA | Merit | Music Performance - Ensemble | |
| 478 | Huang, Dinih | SA | Merit | Music Performance - Solo | |
| 479 | Huang, Yen-Shuen | SA | Merit | Mathematical Methods | |
| 480 | Hughes, Niamh | SA | Merit | Information Processing and Publishing | |