This is the SACE Honour Roll, listing every award, merit or prize won by South Australian SACE students in 2003, along with their school and subject details.
The report also includes significant Australian national awards and prizes such as the Australian Student Prize.
| 263 | Cox, Karen | SA | Merit | Physics | |
| 264 | Coxon, Benedict Francis | SA | Merit | Analytical Studies | |
| 265 | Coxon, Benedict Francis | SA | Merit | Musicianship | |
| 266 | Cozens, Patrick Michael | SA | Merit | Geography | |
| 267 | Craig, Lucy-Anna | SA | Merit | The Arts and the Community | |
| 268 | Craig, Patrea Irene | SA | Merit | English Studies | |
| 269 | Craig, Patrea Irene | SA | Merit | Geography Studies | |
| 270 | Craig, Patrea Irene | SA | Merit | German (Continuers) | |
| 271 | Cramey, Mitchell Andrew | SA | Merit | Economics | |
| 272 | Cramey, Mitchell Andrew | SA | Merit | Mathematical Applications | |
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| 273 | Cranwell, Andrew Scott | SA | Merit | Chemistry | |
| 274 | Cranwell, Andrew Scott | SA | Merit | Mathematical Studies | |
| 275 | Crawford, Lucy Claire | SA | Merit | Chemistry | |
| 276 | Crosby, Danielle Durieu | SA | Merit | Studies of Societies | |
| 277 | Cross, Tamra | SA | Merit | Physical Education | |
| 278 | Culshaw, Andrew James | SA | Merit | Specialist Mathematics | |
| 279 | Cundle, Natasha Emma | SA | Merit | Economics | |
| 280 | Cuthbertson, James | SA | Merit | Biology | |
| 281 | Czyz, Milena | SA | Merit | English as a Second Language | |
| 282 | Daehn, Helmut Christian | SA | Merit | Spanish (Continuers) | |
| 283 | Daehn, Wilhelm Richard | SA | Merit | Spanish (Continuers) | |
| 284 | Dansie, Benjamin Neil | SA | Merit | Physics | |
| 285 | Das, Atandrila Ankan | SA | Merit | Physics | |
| 286 | Daughtry, Justin Paul | SA | Merit | Solo Performance | |
| 287 | Davies, Christopher | SA | Merit | Mathematical Studies | |
| 288 | Davies, Lucy Alice | SA | Merit | Business Studies | |
| 289 | Davies, Lucy Alice | SA | Merit | Child Studies | |
| 290 | Davies, Lucy Alice | SA | Merit | Information Technology | |
| 291 | Davies, Matthew Alick Llewellyn | SA | Merit | Small Business Enterprise | |
| 292 | Davis, Hayley | SA | Merit | Food and Hospitality | |
| 293 | Davis, Hayley | SA | Merit | Geography | |
| 294 | Davis, Zachary | SA | Merit | Geography Studies | |
| 295 | Davityan, Emil | SA | Merit | Legal Studies | |
| 296 | Davityan, Emil | SA | Merit | Modern History | |
| 297 | Day, Courtney | SA | Merit | Work and the Community | |
| 298 | De Boo, Sean Chase | SA | Merit | Physics | |
| 299 | De Sousa, Sunita Maria Christina | SA | Merit | Biology | |
| 300 | De Sousa, Sunita Maria Christina | SA | Merit | Chemistry | |
| 301 | deCourcy-Ireland, Emma | SA | Merit | Biology | |
| 302 | Del Fante, Matthew | SA | Merit | Chemistry | |
| 303 | Del Fante, Matthew | SA | Merit | Economics | |
| 304 | Del Fante, Matthew | SA | Merit | Specialist Mathematics | |
| 305 | Delaney, Thomas James | SA | Merit | English Studies | |
| 306 | Demetriou, Melissa Stephanie | SA | Merit | Mathematical Applications | |
| 307 | Deng, Zhou Jason | SA | Merit | Mathematical Studies | |
| 308 | Devlin, Emma Rose | SA | Merit | Japanese (Continuers) | |
| 309 | Dibble, Gaylene | SA | Merit | Small Business Enterprise | |
| 310 | Dickens, Lyn Sue | SA | Merit | English Studies | |
| 311 | Dickson, Adele | SA | Merit | Visual Arts Studies | |
| 312 | Djurdjevic, Bianca Lauren | SA | Merit | Biology | |