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.
| 905 | SCHILLER, Ariana Paige | SA | Merit | Research Project A | |
| 906 | SCHRAPEL, Erin Jade | SA | Merit | Research Project B | |
| 907 | SCHUBERT, Maggie Grace | SA | Merit | Research Project B | |
| 908 | SCHUBERT, Maggie Grace | SA | Merit | Visual Arts - Art | |
| 909 | SCHUBERT, Stephanie Alice | SA | Merit | Material Products I | |
| 910 | Schultz, Ella | Loxton High School | Loxton | Gov of SA SACE Award | |
| 911 | SCHULTZ, Jordan Alexander | SA | Merit | Physics | |
| 912 | Schutz, Elijah | Pedare Christian College | Golden Grove | Gov of SA SACE Award | |
| 913 | SCHUTZ, Elijah James | SA | Merit | Chemistry | |
| 914 | SCHUTZ, Elijah James | SA | Merit | Mathematical Methods | |
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| 915 | SCHUTZ, Elijah James | SA | Merit | Physics | |
| 916 | SCHUTZ, Elijah James | SA | Merit | Research Project B | |
| 917 | SCHUTZ, Elijah James | SA | Merit | Specialist Mathematics | |
| 918 | SCHUTZ, Henry Eric | SA | Merit | General Mathematics | |
| 919 | SCURRAH, Zeb Stephen | SA | Merit | Workplace Practices | |
| 920 | SEABROOK-BRIDGE, Luka | SA | Merit | English | |
| 921 | SEARLE, Katelyn | SA | Merit | Modern History | |
| 922 | SENADHIPATHI, Tharindi | SA | Merit | Biology | |
| 923 | SEPULVEDA RIVEROS, Catalina | SA | Merit | Communication Products I | |
| 924 | SEQUEIRA, Samantha | SA | Merit | Research Project B | |
| 925 | SHALLOW, Lauren June | SA | Merit | Research Project B | |
| 926 | SHEPHERD, Kirstyn Elise | SA | Merit | Psychology | |
| 927 | SIAW, Elizabeth | SA | Merit | Chemistry | |
| 928 | SIAW, Elizabeth | SA | Merit | English | |
| 929 | SIAW, Elizabeth | SA | Merit | Mathematical Methods | |
| 930 | SIMKIN, Isabelle Chloe | SA | Merit | Spanish (Continuers) | |
| 931 | SIMONS, Tenelle Lee | SA | Merit | Material Products I | |
| 932 | SINGH, Prashansa | SA | Merit | Physics | |
| 933 | SINGH, Prashansa | SA | Merit | Specialist Mathematics | |
| 934 | SITRIN, Shiran | SA | Merit | General Mathematics | |
| 935 | SIVADASAN, Anushka | SA | Merit | Psychology | |
| 936 | SLADE, Alannah | SA | Merit | Workplace Practices | |
| 937 | SLADOJEVIC, Daniel Dusan | SA | Merit | General Mathematics | |
| 938 | SMITH, Ana | SA | Merit | Research Project B | |
| 939 | SMITH, Eden | SA | Merit | Research Project B | |
| 940 | SMITH, Hayden | SA | Merit | Material Products I | |
| 941 | SMITH, Jacqueline Georgia | SA | Merit | General Mathematics | |
| 942 | SMITH, Philippa Jacqueline Macpherson | SA | Merit | Research Project B | |
| 943 | SMITH, Samuel James | SA | Merit | Information Technology | |
| 944 | SMITH, Stuart Eric | SA | Merit | Physics | |
| 945 | SMYTH, Abby Yvette | SA | Merit | Visual Arts - Art | |
| 946 | SNOW, Nicholas William Patrick | SA | Merit | Research Project B | |
| 947 | Solomon, Adele | Adelaide East Education Centre | Paradise | Gov of SA Excellence in Modified SACE Award | |
| 948 | SOLOMON, Isaac Daryll | SA | Merit | Research Project B | |
| 949 | SPEIS, Sonja | SA | Merit | Religion Studies | |
| 950 | SPEIS, Sonja | SA | Merit | Research Project B | |
| 951 | SPYKER, Kalea Adele | SA | Merit | Health | |
| 952 | SQUIRE, Bridie | SA | Merit | Biology | |
| 953 | SQUIRE, Bridie | SA | Merit | English | |
| 954 | Squire, Bridie | St Aloysius College | Adelaide | Gov of SA SACE Award | |