This is the SACE Honour Roll, listing every award, merit or prize won by South Australian SACE students in 2018, along with their school and subject details.
The report also includes significant Australian national awards and prizes such as the Australian Student Prize.
| 205 | COWLING, William Arthur | SA | Merit | Mathematical Methods | |
| 206 | COYLE, Angus | SA | Merit | Research Project B | |
| 207 | CRAIG, Oliver James | SA | Merit | Research Project B | |
| 208 | CRAIG, Sahara | SA | Merit | Material Products I | |
| 209 | CRAWFORD, Katelyn Melinda | SA | Merit | Composing and Arranging | |
| 210 | CRAWFORD, Lachlan | SA | Merit | Chemistry | |
| 211 | CRETTENDEN, Olivia Nicole | SA | Merit | Creative Arts | |
| 212 | CROCKER, Jasmine | SA | Merit | General Mathematics | |
| 213 | CROPLEY, Daniel Haywood | SA | Merit | English Literary Studies | |
| 214 | CROPLEY, Daniel Haywood | SA | Merit | Psychology | |
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| 215 | CROSS, Bethany | SA | Merit | Biology | |
| 216 | CROSS, Bethany | SA | Merit | English Literary Studies | |
| 217 | CROSS, Bethany | SA | Merit | Physics | |
| 218 | Cross, Bethany | St Peters Girls School | Stonyfell | Gov of SA SACE Award | |
| 219 | Crowden, Caleb | Temple Christian College Mile End Campus | Mile End | Gov of SA SACE Award | |
| 220 | CROWLEY, Tate James | SA | Merit | Physics | |
| 221 | CULLEN, Emily | SA | Merit | Essential Mathematics | |
| 222 | CURNOW, Tahlia | SA | Merit | English | |
| 223 | CUSTODIO, Paula Andrea | SA | Merit | Integrated Learning A | |
| 224 | CZECHOWICZ, Adele Iris | SA | Merit | Research Project B | |
| 225 | D'ORTENZIO, Luke Harrison | SA | Merit | English | |
| 226 | DAISH, Georgie Rose | SA | Merit | Biology | |
| 227 | DAISH, Georgie Rose | SA | Merit | Chemistry | |
| 228 | DAISH, Georgie Rose | SA | Merit | General Mathematics | |
| 229 | DALIDOWICZ, Jade | SA | Merit | Visual Arts - Art | |
| 230 | DALKOS, Eleni | SA | Merit | Research Project B | |
| 231 | DALLIMORE, Jasmine | SA | Merit | Society and Culture | |
| 232 | DALWOOD, Oliver | SA | Merit | Workplace Practices | |
| 233 | DAMA, Alethea Laura | SA | Merit | Research Project B | |
| 234 | DANG, Huynh Bao Chau | SA | Merit | Vietnamese (Background Speakers) | |
| 235 | DANG-HUYNH, Liam Phi | SA | Merit | Psychology | |
| 236 | DANIEL, Sasha Helen | SA | Merit | Food and Hospitality | |
| 237 | DASONDI, Aatmaj Shivam | SA | Merit | Chemistry | |
| 238 | DASONDI, Aatmaj Shivam | SA | Merit | General Mathematics | |
| 239 | DASONDI, Aatmaj Shivam | SA | Merit | Physics | |
| 240 | DAVID, Sheryl Ramona | SA | Merit | Research Project B | |
| 241 | DAVIDSON, Kitty Kalpa | SA | Merit | Modern History | |
| 242 | DAVIES, Sophie Elizabeth | SA | Merit | Drama | |
| 243 | DAVIES, Sophie Elizabeth | SA | Merit | English Literary Studies | |
| 244 | DAVIES, Sophie Elizabeth | SA | Merit | Information Processing and Publishing | |
| 245 | DAVIES, Sophie Elizabeth | SA | Merit | Legal Studies | |
| 246 | DAVIES, Sophie Elizabeth | SA | Merit | Solo Performance | |
| 247 | DAWE, Benjamin Thomas Humphries | SA | Merit | Chemistry | |
| 248 | DAY, Eliza Jayne | SA | Merit | English | |
| 249 | DAY, Eliza Jayne | SA | Merit | Physical Education | |
| 250 | DAYMAN, Michael William | SA | Merit | Research Project A | |
| 251 | DE BARRO, Courtney Annalise | SA | Merit | English | |
| 252 | DE PIZZOL, Zali | SA | Merit | Business and Enterprise | |
| 253 | DE PIZZOL, Zali | SA | Merit | English | |
| 254 | DE ZOYSA, Randula | SA | Merit | Physics | |