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.
| 1069 | WALSH, Bradyn | SA | Merit | English Literary Studies | |
| 1070 | WALSH, Bradyn | SA | Merit | Mathematical Methods | |
| 1071 | WALSH, Bradyn | SA | Merit | Physics | |
| 1072 | WALSH, Bradyn | SA | Merit | Specialist Mathematics | |
| 1073 | Walsh, Bradyn | Endeavour College | Mawson Lakes | Gov of SA SACE Award | |
| 1074 | WALTER, Jarod | SA | Merit | Business and Enterprise | |
| 1075 | WALTER, Jarod | SA | Merit | English | |
| 1076 | WANG, Gina | SA | Merit | Biology | |
| 1077 | WANG, Haokun | SA | Merit | Research Project B | |
| 1078 | WANG, Shengxian | SA | Merit | Essential English | |
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| 1079 | WANG, Shijie | SA | Merit | Research Project B | |
| 1080 | WANG, Shine | SA | Merit | Biology | |
| 1081 | WANG, Shine | SA | Merit | Chemistry | |
| 1082 | WANG, Shine | SA | Merit | Ensemble Performance | |
| 1083 | WANG, Shine | SA | Merit | Physics | |
| 1084 | WARAGODA, Ramith Peshala | SA | Merit | General Mathematics | |
| 1085 | WARD, Lauren Emma | SA | Merit | English | |
| 1086 | WARING, Olivia | SA | Merit | Psychology | |
| 1087 | WARK, Kelsey | SA | Merit | Religion Studies | |
| 1088 | WARK, Kelsey | SA | Merit | Research Project B | |
| 1089 | WARREN, Henry | SA | Merit | Integrated Learning A | |
| 1090 | WARRICK, William | SA | Merit | Research Project B | |
| 1091 | WARSAME, Estahil Awil | SA | Merit | Society and Culture | |
| 1092 | WATERHOUSE, Eliza | SA | Merit | General Mathematics | |
| 1093 | WATERS, Zoe Sofia | SA | Merit | Solo Performance | |
| 1094 | WATSON, Millicent Bronte | SA | Merit | Business and Enterprise | |
| 1095 | WATTS, Gabrielle Louise | SA | Merit | Essential Mathematics | |
| 1096 | WATTS, Lucinda Grace | SA | Merit | Biology | |
| 1097 | WATZDORF, Angela Julie | SA | Merit | Economics | |
| 1098 | WATZDORF, Angela Julie | SA | Merit | Psychology | |
| 1099 | WEI, Yaqi | SA | Merit | Biology | |
| 1100 | Wei, Yaqi | Blackwood High School | Eden Hills | Gov of SA SACE Award | |
| 1101 | WELLS, Milla Ursula | SA | Merit | Research Project B | |
| 1102 | WELSBY, George Oscar Sheidow | SA | Merit | Business and Enterprise | |
| 1103 | WELSBY, George Oscar Sheidow | SA | Merit | English | |
| 1104 | WESLEY, Geordie | SA | Merit | Research Project B | |
| 1105 | WHITE, Hamish Timothy | SA | Merit | Research Project B | |
| 1106 | WHITE, Tulani Michelle | SA | Merit | Nutrition | |
| 1107 | WHITEHEAD, Jasper Tobias | SA | Merit | General Mathematics | |
| 1108 | WHITFORD, Elouise Jane | SA | Merit | Business and Enterprise | |
| 1109 | WHITFORD, Elouise Jane | SA | Merit | Research Project B | |
| 1110 | WHYATT, Natalie Kate | SA | Merit | English | |
| 1111 | WICHMANN, Evangelia Therese | SA | Merit | Integrated Learning A | |
| 1112 | WILLIAMS, Henry Lawrence | SA | Merit | Research Project B | |
| 1113 | WILLIAMS, Joshua Daniel | SA | Merit | General Mathematics | |
| 1114 | WILLIAMS, Madeline Rose | SA | Merit | Research Project B | |
| 1115 | WILLIAMS, Sequoyah | SA | Merit | Information Processing and Publishing | |
| 1116 | WILSON, Alexandra Grace | SA | Merit | Biology | |
| 1117 | WILSON, Laura Caitlin | SA | Merit | Business and Enterprise | |
| 1118 | WILSON, Samuel William Kyffin | SA | Merit | Biology | |