This report shows the total number of HSC Distinguished Achiever awards won by students in each subject at each school during 2021.
| 1 | Abbotsleigh | Wahroonga | English Advanced | 75 |
| 2 | Abbotsleigh | Wahroonga | Mathematics Advanced | 51 |
| 3 | Abbotsleigh | Wahroonga | Mathematics Extension 1 | 42 |
| 4 | Abbotsleigh | Wahroonga | Biology | 26 |
| 5 | Abbotsleigh | Wahroonga | Modern History | 23 |
| 6 | Abbotsleigh | Wahroonga | Economics | 21 |
| 7 | Abbotsleigh | Wahroonga | Geography | 21 |
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| 8 | Abbotsleigh | Wahroonga | Visual Arts | 21 |
| 9 | Abbotsleigh | Wahroonga | Chemistry | 18 |
| 10 | Abbotsleigh | Wahroonga | Mathematics Extension 2 | 18 |
| 11 | Abbotsleigh | Wahroonga | Business Studies | 15 |
| 12 | Abbotsleigh | Wahroonga | English Extension 1 | 15 |
| 13 | Abbotsleigh | Wahroonga | Physics | 13 |
| 14 | Abbotsleigh | Wahroonga | History Extension | 12 |
| 15 | Abbotsleigh | Wahroonga | Ancient History | 10 |
| 16 | Abbotsleigh | Wahroonga | Design and Technology | 10 |
| 17 | Abbotsleigh | Wahroonga | Latin Extension | 8 |
| 18 | Abbotsleigh | Wahroonga | Music 2 | 7 |
| 19 | Abbotsleigh | Wahroonga | Personal Development, Health and Physical Education | 6 |
| 20 | Abbotsleigh | Wahroonga | Chinese Continuers | 5 |
| 21 | Abbotsleigh | Wahroonga | Mathematics Standard 2 | 5 |
| 22 | Abbotsleigh | Wahroonga | Studies of Religion I | 5 |
| 23 | Abbotsleigh | Wahroonga | Music Extension | 4 |
| 24 | Abbotsleigh | Wahroonga | Chinese in Context | 3 |
| 25 | Abbotsleigh | Wahroonga | English Extension 2 | 3 |
| 26 | Abbotsleigh | Wahroonga | Chinese Extension | 2 |
| 27 | Abbotsleigh | Wahroonga | Drama | 2 |
| 28 | Abbotsleigh | Wahroonga | Earth and Environmental Science | 2 |
| 29 | Abbotsleigh | Wahroonga | Music 1 | 2 |
| 30 | Abbotsleigh | Wahroonga | Software Design and Development | 2 |
| 31 | Abbotsleigh | Wahroonga | Dutch Continuers | 1 |
| 32 | Abbotsleigh | Wahroonga | French Continuers | 1 |
| 33 | Abbotsleigh | Wahroonga | German Continuers | 1 |
| 34 | Abbotsleigh | Wahroonga | German Extension | 1 |
| 35 | Abbotsleigh | Wahroonga | Japanese Beginners | 1 |
| 36 | Abbotsleigh | Wahroonga | Latin Continuers | 1 |
| 37 | Abbotsleigh | Wahroonga | Science Extension | 1 |
| 38 | Abbotsleigh | Wahroonga | Studies of Religion II | 1 |