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.
| 213 | Coelho, Gabriela | SA | Merit | Italian (Continuers) | |
| 214 | Coelho, Gabriela | SA | Merit | Research Project B | |
| 215 | Coles, Robyn Leigh | SA | Merit | Biology | |
| 216 | Coles, Robyn Leigh | SA | Merit | Research Project B | |
| 217 | Colovic, Emma Grace | SA | Merit | Research Project B | |
| 218 | Colwell, Ava-Bian | SA | Merit | Legal Studies | |
| 219 | Combe, Angus William | SA | Merit | General Mathematics | |
| 220 | Condo, Andrew | SA | Merit | Visual Arts - Art | |
| 221 | Condo, Cartia | SA | Merit | Food and Hospitality | |
| 222 | Connolly, Gabrielle | Cardijn College Marian Campus | Noarlunga Downs | Gov of SA SACE Award | |
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| 223 | Consalvo, Alana | SA | Merit | Research Project B | |
| 224 | Cook, Benjamin Joseph | SA | Merit | Chemistry | |
| 225 | Cook, Lauren Jade | SA | Merit | Health | |
| 226 | Cooper, Madeline (Deli) | SA | Merit | Research Project B | |
| 227 | Cooper-Baldock, Emma Jade | SA | Merit | Food and Hospitality | |
| 228 | Copeland, Lara | SA | Merit | Psychology | |
| 229 | Corbett, Millie Grace | SA | Merit | English | |
| 230 | Corbo, Daniela | SA | Merit | Child Studies | |
| 231 | Corrie, Sam | SA | Merit | General Mathematics | |
| 232 | Corrie, Sophia | SA | Merit | General Mathematics | |
| 233 | Corston, Aleka | SA | Merit | Research Project B | |
| 234 | Courtney, Isabella | SA | Merit | Research Project B | |
| 235 | Croft, Michael | SA | Merit | Material Solutions | |
| 236 | Cronin, Mahalia Jay | SA | Merit | Research Project B | |
| 237 | Crowden, Charlotte Louise | SA | Merit | Food and Hospitality | |
| 238 | Crowhurst, Alicia Belle | SA | Merit | Modern History | |
| 239 | Curthoys-Davies, Harli Ai | SA | Merit | Chemistry | |
| 240 | Curthoys-Davies, Harli Ai | SA | Merit | English | |
| 241 | Curtis, Charlotte Alexandra | SA | Merit | Health | |
| 242 | Cutter, Benjamin | SA | Merit | General Mathematics | |
| 243 | Cutter, Benjamin | SA | Merit | Legal Studies | |
| 244 | d'Achille, Matthew | SA | Merit | Mathematical Methods | |
| 245 | d'Achille, Matthew | SA | Merit | Research Project B | |
| 246 | d'Silva, Liam | SA | Merit | Psychology | |
| 247 | Daija, Kliti | SA | Merit | Research Project A | |
| 248 | Dalton, Catherine | St Marys College | Adelaide | Gov of SA SACE Award | |
| 249 | Datta Gupta, Koninika | SA | Merit | English | |
| 250 | Davidson, Molly | SA | Merit | Business Innovation | |
| 251 | Davis, Aidyn | Naracoorte High School | Naracoorte | Gov of SA SACE Award | |
| 252 | Davis, Kyla Jasmijn | SA | Merit | Research Project B | |
| 253 | Davis, Oliver | SA | Merit | Material Solutions | |
| 254 | Dawe, Ashleigh Jennifer | SA | Merit | English | |
| 255 | Dawe, Ashleigh Jennifer | SA | Merit | Integrated Learning A | |
| 256 | de Bacco, Gabriel | SA | Merit | Industry and Entrepreneurial Solutions | |
| 257 | de Gennaro, Sarah | SA | Merit | Research Project B | |
| 258 | de Pasquale, Joel Alexander | SA | Merit | Mathematical Methods | |
| 259 | Dean, Emma Louise | SA | Merit | Research Project B | |
| 260 | Degilio, Kayla Jae | SA | Merit | Integrated Learning B | |
| 261 | Dell'Oro, Alana | SA | Merit | Visual Arts - Design | |
| 262 | Devgun, Eesha | SA | Merit | General Mathematics | |