This report shows the 2021 top students in each HSC subject, along with their ranking as assigned by the NSW Education Standards Authority.
Rankings are calculated from student HSC marks in the subject, or, where this results in a tie, from the average of the students' examination and assessment marks.
Students must achieve a band 6 or band E4 result in the relevant subject to appear in this list.
The number of top achievers reported varies from 5 to 20, according to the number of candidates taking each subject.
| 1 | Design and Technology | Carter, Lucrecia | 1 | St Benedicts Catholic College | Oran Park |
| 2 | Design and Technology | Lumby, Zoe | 1 | St Lukes Grammar School | Dee Why |
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| 3 | Design and Technology | Cornford, Samantha | 3 | Warners Bay High School | Warners Bay |
| 4 | Design and Technology | McInerney-Wand, Jemma | 3 | Caringbah High School | Caringbah |
| 5 | Design and Technology | Dengate, Joshua | 5 | Gilroy Catholic College | Castle Hill |
| 6 | Design and Technology | Roshka, Johanna | 5 | Liverpool Girls High School | Liverpool |
| 7 | Design and Technology | Stillitano, Frank | 5 | Magdalene Catholic College | Narellan |
| 8 | Design and Technology | Walsh, Jessica | 5 | Bradfield College | St Leonards |
| 9 | Design and Technology | Feather, William David | 9 | Knox Grammar School | Wahroonga |
| 10 | Design and Technology | Murray, Jacob | 9 | De La Salle College Revesby Heights | Revesby Heights |