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.
| 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 | |
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| 282 | Dichiera, Sienna | SA | Merit | Research Project B | |
| 283 | Didone, Carla | SA | Merit | General Mathematics | |
| 284 | Dietrich, Maddison | SA | Merit | Food and Hospitality | |
| 285 | Dinh, Nhu Y | SA | Merit | Research Project B | |
| 286 | Dippy, Imogen | SA | Merit | Research Project B | |
| 287 | Ditter, Jacob Gordon | SA | Merit | Industry and Entrepreneurial Solutions | |
| 288 | Ditter, Jacob Gordon | SA | Merit | Physics | |
| 289 | Dixon, Cameron Justin | SA | Merit | Business Innovation | |
| 290 | Dixon, Ella Mae | SA | Merit | Child Studies | |
| 291 | Dizon, Jay | SA | Merit | English | |
| 292 | Dizon, Jay | SA | Merit | Research Project A | |
| 293 | Dmytriw, Hannah | SA | Merit | Research Project B | |
| 294 | Dodd, Amylea | SA | Merit | Workplace Practices | |
| 295 | Dodman, Kate | SA | Merit | Essential English | |
| 296 | Doering, Daniel | SA | Merit | General Mathematics | |
| 297 | Dolling, Annabelle Alice Elizabeth | SA | Merit | Physical Education | |
| 298 | Dolman, Lottie Fayth | SA | Merit | Visual Arts - Design | |
| 299 | Dolphin, Emilia Jane | SA | Merit | Physical Education | |
| 300 | Donato, Lauren Claire | SA | Merit | Italian (Continuers) | |
| 301 | Donato, Lauren Claire | SA | Merit | Society and Culture | |
| 302 | Donley, Mahalia Grace | SA | Merit | Biology | |
| 303 | Doshi, Mihir | SA | Merit | Mathematical Methods | |
| 304 | Doshi, Mihir | SA | Merit | Workplace Practices | |
| 305 | Douglas, Abigail | SA | Merit | English Literary Studies | |
| 306 | Douglas, Abigail | SA | Merit | Modern History | |
| 307 | Douglas, Abigail | SA | Merit | Politics, Power and People | |
| 308 | Dowd, Amelia Grace | SA | Merit | Food and Hospitality | |
| 309 | Draper, Andrew Nicholas | SA | Merit | Research Project B | |
| 310 | Draper, Samuel Stefan Angus | SA | Merit | English | |
| 311 | Drillis, Jamison Peter | SA | Merit | English | |
| 312 | Dugan, Emily | SA | Merit | Health and Wellbeing | |
| 313 | Duiker, Estella Wynne | SA | Merit | Physics | |
| 314 | Duncan, Riley | SA | Merit | English | |
| 315 | Dunlop, Joel | SA | Merit | Material Solutions | |
| 316 | Dutka, Justyna Joanna | SA | Merit | Biology | |
| 317 | Dutschke, Samantha Kym | SA | Merit | Research Project B | |
| 318 | Ecimovic, Anya Manda | SA | Merit | English | |
| 319 | Edwards, Charlotte | SA | Merit | Essential Mathematics | |
| 320 | Egarr, Olivia Jeanette | SA | Merit | Modern History | |
| 321 | Ehlers, Katie Kelly | SA | Merit | English | |