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.
| 1091 | Stallard, Taylah | SA | Merit | Research Project B | |
| 1092 | Stamatelopoulo, Zoi | SA | Merit | Religion Studies | |
| 1093 | Stamatelopoulo, Zoi | SA | Merit | Research Project B | |
| 1094 | Stark, Caitlin | SA | Merit | Material Solutions | |
| 1095 | Stark, Caitlin | SA | Merit | Visual Arts - Design | |
| 1096 | Starr, Erin | SA | Merit | Business Innovation | |
| 1097 | Starr, Ned Matthew Ravi | SA | Merit | Research Project B | |
| 1098 | Stephens, Zack | SA | Merit | Modern History | |
| 1099 | Stevens, Jordan Elise | SA | Merit | Research Project B | |
| 1100 | Stock, Isabella Elsie | SA | Merit | Tourism | |
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| 1101 | Stone, Rachael | SA | Merit | Biology | |
| 1102 | Stopford, Zoe | SA | Merit | English | |
| 1103 | Stracci, Jazzlin Marie Adele | SA | Merit | English | |
| 1104 | Subba, Trishna | SA | Merit | Language and Culture | |
| 1105 | Sudhir, Anushka | SA | Merit | English | |
| 1106 | Suica, Melita Rose | SA | Merit | Food and Hospitality | |
| 1107 | Sutton, Olivia | SA | Merit | Material Solutions | |
| 1108 | Swaffer, Jett | SA | Merit | English | |
| 1109 | Swaffer, Jett | SA | Merit | Physical Education | |
| 1110 | Swallowe, Alfie Benjamin | SA | Merit | General Mathematics | |
| 1111 | Swan, Tiana | SA | Merit | Research Project B | |
| 1112 | Swinburne, Lydia Ruth | SA | Merit | Modern History | |
| 1113 | Switajewski, Sophia Anne | SA | Merit | Mathematical Methods | |
| 1114 | Switajewski, Sophia Anne | SA | Merit | Research Project B | |
| 1115 | Sydney-Jones, Erin | SA | Merit | English | |
| 1116 | Symonds, Skye | SA | Merit | Music Performance - Solo | |
| 1117 | Ta, Eric | SA | Merit | Visual Arts - Design | |
| 1118 | Taddeo, Daniel | SA | Merit | Integrated Learning A | |
| 1119 | Tallent, Olivia Emily | SA | Merit | Physical Education | |
| 1120 | Tallent, Olivia Emily | SA | Merit | Research Project B | |
| 1121 | Tamlin, Kassidy | SA | Merit | Food and Hospitality | |
| 1122 | Tan, Kobe | SA | Merit | General Mathematics | |
| 1123 | Tang, Perl | SA | Merit | Research Project B | |
| 1124 | Tanner, Ruby | SA | Merit | Physical Education | |
| 1125 | Tanner, Ruby | SA | Merit | Research Project B | |
| 1126 | Tarca, Poppy | SA | Merit | Information Processing and Publishing | |
| 1127 | Taylor, Erin Louise | SA | Merit | Research Project B | |
| 1128 | Taylor, Shannon Lee | SA | Merit | General Mathematics | |
| 1129 | Teague, Veronika | SA | Merit | English | |
| 1130 | Teague, Veronika | SA | Merit | General Mathematics | |
| 1131 | Telfer, Anjali Gabriella | SA | Merit | English Literary Studies | |
| 1132 | Tennant, Jack Caleb | SA | Merit | Material Solutions | |
| 1133 | Teo, Kaitlin | SA | Merit | General Mathematics | |
| 1134 | Thai, Athena Linh Gia | SA | Merit | Chemistry | |
| 1135 | Thai, Athena Linh Gia | SA | Merit | English | |
| 1136 | Thomas, Ariana Joy | SA | Merit | English | |
| 1137 | Thomas, Chloe | SA | Merit | General Mathematics | |
| 1138 | Thompson, Ashlyn | SA | Merit | Research Project B | |
| 1139 | Thompson, Gabrielle Grace | SA | Merit | General Mathematics | |
| 1140 | Thompson, Lucy Grace | SA | Merit | General Mathematics | |