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.
| 911 | Pham, Anthony | St Peters College | St Peters | Prize: Australian Institute of Physics Prize - Bronze Bragg Medal | Physics |
| 912 | Pham, Phuong Y Nhi | SA | Merit | English as an Additional Language | |
| 913 | Pham, Phuong Y Nhi | SA | Merit | Industry and Entrepreneurial Solutions | |
| 914 | Pham, Phuong Y Nhi | SA | Merit | Research Project B | |
| 915 | Pham, Van-Leon The | SA | Merit | Research Project A | |
| 916 | Phelan, Renae Rosemary | SA | Merit | Research Project B | |
| 917 | Phua, Erica Le-Yi | SA | Merit | Biology | |
| 918 | Piotto, Anton | SA | Merit | Research Project B | |
| 919 | Piyaratna, Malik Enrique | SA | Merit | Robotic and Electronic Systems | |
| 920 | Placucci, Parisa Linda | SA | Merit | Research Project B | |
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| 921 | Podreka, Josip Giovanni | SA | Merit | Research Project B | |
| 922 | Politis, Macie Angelique | SA | Merit | Research Project B | |
| 923 | Poolan, Ashleigh Elizabeth | SA | Merit | Research Project B | |
| 924 | Popping, Oscar William | SA | Merit | Research Project B | |
| 925 | Portolesi, Catherine Anne Kay | SA | Merit | Research Project B | |
| 926 | Powell, Ellie-Grace Alice | SA | Merit | English | |
| 927 | Provatas, Alex | SA | Merit | Mathematical Methods | |
| 928 | Pryor, Georgia | SA | Merit | Research Project B | |
| 929 | Psevdos, Christo | SA | Merit | Visual Arts - Design | |
| 930 | Purdie, James | SA | Merit | Society and Culture | |
| 931 | Qin, Matthew Wang | SA | Merit | Biology | |
| 932 | Raftopoulos, Georgia Kate | SA | Merit | Music Explorations | |
| 933 | Raftopoulos, Georgia Kate | SA | Merit | Music Performance - Solo | |
| 934 | Rahimi, Hasina | SA | Merit | Scientific Studies | |
| 935 | Rajapaksha, Dilan Anuradha | SA | Merit | Biology | |
| 936 | Rajapaksha, Dilan Anuradha | SA | Merit | Chemistry | |
| 937 | Rakocevic, Damien | SA | Merit | English | |
| 938 | Ralph, Gemma Hope | SA | Merit | General Mathematics | |
| 939 | Ramsay, Kelly Ann | SA | Merit | General Mathematics | |
| 940 | Ransom, Joel | St Johns Grammar School | Belair | Gov of SA SACE Award | |
| 941 | Rao, Anushka | SA | Merit | English | |
| 942 | Rapuano, Sebastian | SA | Merit | English | |
| 943 | Rapuano, Sebastian | SA | Merit | General Mathematics | |
| 944 | Rapuano, Sebastian | SA | Merit | Research Project B | |
| 945 | Rault, Amelia | SA | Merit | Research Project B | |
| 946 | Ravindra, Neha | SA | Merit | Research Project B | |
| 947 | Ravindran, Sachin | SA | Merit | Chemistry | |
| 948 | Ravindran, Sachin | SA | Merit | Mathematical Methods | |
| 949 | Ravindran, Sachin | SA | Merit | Physics | |
| 950 | Ravindran, Sachin | SA | Merit | Specialist Mathematics | |
| 951 | Raw, Jonathan Samuel | SA | Merit | Research Project B | |
| 952 | Rawlins, Sienna | SA | Merit | Business Innovation | |
| 953 | Rawlins, Sienna | SA | Merit | Child Studies | |
| 954 | Rawlins, Sienna | SA | Merit | Research Project B | |
| 955 | Rees, Marney Victoria | SA | Merit | Mathematical Methods | |
| 956 | Rees, Marney Victoria | SA | Merit | Specialist Mathematics | |
| 957 | Reid, Emma | SA | Merit | Research Project B | |
| 958 | Reimann, Billie Jay | SA | Merit | Research Project B | |
| 959 | Reimers, Kyan | SA | Merit | Mathematical Methods | |
| 960 | Rendell, Isabella Grace | SA | Merit | English | |