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.
| 235 | Daish, Taleah Grace | SA | Merit | General Mathematics | |
| 236 | Dal Bello, Joseph | SA | Merit | English | |
| 237 | Dally, Sarah Maddison | SA | Merit | General Mathematics | |
| 238 | Dang, Catherine Nguyen | SA | Merit | Chemistry | |
| 239 | Dang, Tam Minh | SA | Merit | Digital Technologies | |
| 240 | Danish, Ammar | SA | Merit | Research Project B | |
| 241 | Datta Gupta, Koninika | SA | Merit | Essential Mathematics | |
| 242 | Datta Gupta, Koninika | SA | Merit | Psychology | |
| 243 | Davey, Grace | SA | Merit | Legal Studies | |
| 244 | Davidson, Georgia Clare | SA | Merit | Drama | |
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| 245 | Davies, Benjamin | SA | Merit | English | |
| 246 | Davies, Edward Anthony | SA | Merit | Accounting | |
| 247 | Davies, Edward Anthony | SA | Merit | Economics | |
| 248 | Davies, Edward Anthony | SA | Merit | Physics | |
| 249 | Davies, Edward Anthony | SA | Merit | Research Project B | |
| 250 | Davies, Emily Sian | SA | Merit | Research Project B | |
| 251 | Davies, Jonathan William Charles | SA | Merit | English | |
| 252 | Davies, Rhys Jac | SA | Merit | Research Project B | |
| 253 | Davill, Caitlyn Rose Alice | SA | Merit | Health and Wellbeing | |
| 254 | de Angelis, Antonia Italia | SA | Merit | Biology | |
| 255 | de Angelis, Antonia Italia | SA | Merit | Chemistry | |
| 256 | de Angelis, Antonia Italia | SA | Merit | Physics | |
| 257 | de Beer, Kiera Amelia | SA | Merit | Psychology | |
| 258 | de Los Santos, Jose | SA | Merit | English | |
| 259 | de Pasquale, Joel Alexander | SA | Merit | Biology | |
| 260 | de Pasquale, Joel Alexander | SA | Merit | Physics | |
| 261 | de Pasquale, Joel Alexander | SA | Merit | Research Project B | |
| 262 | de Rosa, Alana Filomena | SA | Merit | Accounting | |
| 263 | de Rosa, Alana Filomena | SA | Merit | Psychology | |
| 264 | de Silva Palihakkara, Ayesha Jillion Shashini | SA | Merit | Child Studies | |
| 265 | de Silva, Uyanege Methma Lakdini | SA | Merit | Chemistry | |
| 266 | de Silva, Uyanege Methma Lakdini | SA | Merit | Psychology | |
| 267 | Deakin, Thomas Henry | SA | Merit | Robotic and Electronic Systems | |
| 268 | Dechellis, Marie Olivia | SA | Merit | Psychology | |
| 269 | Del Carmen, Nestor Miguel | SA | Merit | Research Project B | |
| 270 | Demina, Maria | SA | Merit | Russian (Continuers) | |
| 271 | Denton, Amy Claire | SA | Merit | Biology | |
| 272 | Denton, Amy Claire | SA | Merit | Psychology | |
| 273 | Devinuwara, Ninuri Jinara | SA | Merit | Psychology | |
| 274 | Dhawan, Aryan Raj | SA | Merit | Chemistry | |
| 275 | Dhawan, Aryan Raj | SA | Merit | Mathematical Methods | |
| 276 | Di Cola, Lily | Cabra Dominican College | Cumberland Park | Gov of SA SACE Award | |
| 277 | Di Iulio, Fabian | SA | Merit | English | |
| 278 | Di Tomaso, Hannah Jai | SA | Merit | Health and Wellbeing | |
| 279 | Di Tomaso, Hannah Jai | SA | Merit | Nutrition | |
| 280 | Dianos, Christian | SA | Merit | English | |
| 281 | Dichiera, Mia | SA | Merit | Visual Arts - Design | |
| 282 | Dichiera, Sienna | SA | Merit | Research Project B | |
| 283 | Didone, Carla | SA | Merit | General Mathematics | |
| 284 | Dietrich, Maddison | SA | Merit | Food and Hospitality | |