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.
| 391 | Gorpynyak, Maria | SA | Merit | Language and Culture | |
| 392 | Gorrie, Sam Giorgio Mercurio | SA | Merit | Mathematical Methods | |
| 393 | Goss, Daniel James | SA | Merit | Research Project A | |
| 394 | Gough, Hannah | SA | Merit | English Literary Studies | |
| 395 | Gouskos, Peta | SA | Merit | Biology | |
| 396 | Grainger, Grace | SA | Merit | Research Project B | |
| 397 | Gray, Cerys Emily | SA | Merit | Material Solutions | |
| 398 | Green, Callum | SA | Merit | Geography | |
| 399 | Greenfield, Bridie Bethany | SA | Merit | Outdoor Education | |
| 400 | Gregurev, Grace Emily | SA | Merit | Research Project B | |
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| 401 | Greig, Charlotte Eva | SA | Merit | Research Project B | |
| 402 | Griffiths, Cloe | SA | Merit | Drama | |
| 403 | Griffiths, Cloe | SA | Merit | Workplace Practices | |
| 404 | Grotto, Anthony Paul | SA | Merit | Mathematical Methods | |
| 405 | Grout, Danielle | SA | Merit | Ancient Studies | |
| 406 | Grover, Meg Hannah | SA | Merit | Child Studies | |
| 407 | Grover, Meg Hannah | SA | Merit | General Mathematics | |
| 408 | Guerrero, Yuan Miguel | SA | Merit | Research Project A | |
| 409 | Guglielmucci, Lara | SA | Merit | Biology | |
| 410 | Guglielmucci, Lara | SA | Merit | Research Project B | |
| 411 | Gulliver, Asha Emily | SA | Merit | Psychology | |
| 412 | Gunn, Chloe Chantelle | SA | Merit | Integrated Learning B | |
| 413 | Gunn, Lily Chanel | SA | Merit | Research Project B | |
| 414 | Gunn, Marcus Georg Malcolm | SA | Merit | Physics | |
| 415 | Guy, Alice Sylvia | SA | Merit | Drama | |
| 416 | Ha, Mai Thu | SA | Merit | Material Solutions | |
| 417 | Ha, Mi Thao Linh | SA | Merit | Vietnamese (Continuers) | |
| 418 | Haddad, Jack | SA | Merit | Psychology | |
| 419 | Haddad, Ky | SA | Merit | Research Project B | |
| 420 | Hagicostas, Max | SA | Merit | Research Project B | |
| 421 | Haider, Hania | SA | Merit | Biology | |
| 422 | Halliwell, Lucie Anne | SA | Merit | Industry and Entrepreneurial Solutions | |
| 423 | Hansch-Maher, Silas | Saint Ignatius College | Athelstone | Gov of SA SACE Award | |
| 424 | Hansch-Maher, Silas Luis Horatio | SA | Merit | Biology | |
| 425 | Hansch-Maher, Silas Luis Horatio | SA | Merit | Integrated Learning A | |
| 426 | Hansch-Maher, Silas Luis Horatio | SA | Merit | Physics | |
| 427 | Hansen, Dana | SA | Merit | Creative Arts | |
| 428 | Hansen, Erin Grace | SA | Merit | Research Project B | |
| 429 | Hari, Abhishek | SA | Merit | Research Project B | |
| 430 | Harker, Olivia Cate | SA | Merit | General Mathematics | |
| 431 | Harker, Olivia Cate | SA | Merit | Nutrition | |
| 432 | Harris, Angela Jade | SA | Merit | Psychology | |
| 433 | Harrison, Jordan | SA | Merit | General Mathematics | |
| 434 | Hart, Alisha Rose | SA | Merit | Integrated Learning A | |
| 435 | Hart, Joshua Jefferson | SA | Merit | Digital Communication Solutions | |
| 436 | Hartell, Charlotte | SA | Merit | Psychology | |
| 437 | Harvey, Ashleigh | SA | Merit | Research Project B | |
| 438 | Hasnat, Adnan | SA | Merit | Legal Studies | |
| 439 | Hasnat, Adnan | SA | Merit | Physics | |
| 440 | Hastings, Olivia Rose | SA | Merit | Psychology | |