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.
| 601 | Mathematics Extension 1 | Wang, Alex | 6 | James Ruse Agricultural High School | Carlingford |
| 602 | Mathematics Extension 1 | Harris, Lachlan | 7 | Cranbrook School | Bellevue Hill |
| 603 | Mathematics Extension 1 | Arora, Rishi | 8 | Normanhurst Boys High School | Normanhurst |
| 604 | Mathematics Extension 1 | Cerneaz, Izaak | 8 | St Augustines College | Brookvale |
| 605 | Mathematics Extension 1 | Chen, Darryl | 8 | James Ruse Agricultural High School | Carlingford |
| 606 | Mathematics Extension 1 | Duncan-Keen, Callum | 8 | Scots All Saints College | White Rock |
| 607 | Mathematics Extension 1 | Huang, Jordan Hao Cheng | 8 | SHORE Sydney Church of England Grammar School | North Sydney |
| 608 | Mathematics Extension 1 | Karem, Sara | 8 | Al-Faisal College | Auburn |
| 609 | Mathematics Extension 1 | Oh, Michelle Yujin | 8 | Meriden School | Strathfield |
| 610 | Mathematics Extension 1 | Woolford, Oscar | 8 | Coffs Harbour Senior College | Coffs Harbour |
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| 611 | Mathematics Extension 1 | Zhou, Kaiyang | 8 | The Kings School | North Parramatta |
| 612 | Mathematics Extension 2 | Thenuwara, Luchith Yahan | 1 | Baulkham Hills High School | Baulkham Hills |
| 613 | Mathematics Extension 2 | Chen, Darryl | 2 | James Ruse Agricultural High School | Carlingford |
| 614 | Mathematics Extension 2 | Hoang, Vivian Anh Vy | 3 | Sefton High School | Sefton |
| 615 | Mathematics Extension 2 | Karem, Sara | 4 | Al-Faisal College | Auburn |
| 616 | Mathematics Extension 2 | Xu, Derek | 5 | Sydney Grammar School | Darlinghurst |
| 617 | Mathematics Extension 2 | Kertesz, Tobias | 6 | Sydney Grammar School | Darlinghurst |
| 618 | Mathematics Extension 2 | Ai, Christopher Jed | 7 | Knox Grammar School | Wahroonga |
| 619 | Mathematics Extension 2 | Daoud, Philo | 8 | St Marks Coptic Orthodox College | Wattle Grove |
| 620 | Mathematics Extension 2 | Arora, Rishi | 9 | Normanhurst Boys High School | Normanhurst |
| 621 | Mathematics Extension 2 | Mann, Gurkeerat | 10 | James Ruse Agricultural High School | Carlingford |
| 622 | Mathematics Extension 2 | Oh, Michelle Yujin | 11 | Meriden School | Strathfield |
| 623 | Mathematics Standard 1 Examination | Choy, Corina | 1 | Bethany College | Hurstville |
| 624 | Mathematics Standard 1 Examination | Lozanovski, Jade | 2 | Bethany College | Hurstville |
| 625 | Mathematics Standard 1 Examination | Cassaniti, Michael | 3 | Gilroy Catholic College | Castle Hill |
| 626 | Mathematics Standard 1 Examination | Obreza, Sophie Maureen | 3 | Catherine McAuley Westmead | Westmead |
| 627 | Mathematics Standard 1 Examination | Rasaku, Ratu | 5 | Bass High School | Bass Hill |
| 628 | Mathematics Standard 1 Examination | Gudgeon, Olivia | 6 | WAYS Secondary | North Bondi |
| 629 | Mathematics Standard 1 Examination | Stretton, Nicholas | 7 | Avondale School | Cooranbong |
| 630 | Mathematics Standard 1 Examination | Brookes, Holly | 8 | Heathcote High School | Heathcote |
| 631 | Mathematics Standard 1 Examination | Lillis, Lucinda | 9 | St Matthews Catholic School | Mudgee |
| 632 | Mathematics Standard 1 Examination | Stewart, Lachlan Andrew Davis | 9 | St Josephs College Hunters Hill | Hunters Hill |
| 633 | Mathematics Standard 2 | Castelino, Cedric | 1 | Parramatta Marist High School | Westmead |
| 634 | Mathematics Standard 2 | Morley, Luke | 1 | St Augustines College | Brookvale |
| 635 | Mathematics Standard 2 | Warwar, Rukayah | 3 | Al-Faisal College | Auburn |
| 636 | Mathematics Standard 2 | Aravanis, Patrice Ellen | 4 | Meriden School | Strathfield |
| 637 | Mathematics Standard 2 | Daunoras, Sophia | 4 | St Patricks College Sutherland | Sutherland |
| 638 | Mathematics Standard 2 | Palmer, Kimberley | 4 | MacKillop College Port Macquarie | Port Macquarie |
| 639 | Mathematics Standard 2 | Alobeidi, Rossel | 7 | Alpha Omega Senior College | Auburn |
| 640 | Mathematics Standard 2 | Alameen, Shumoos | 8 | Al-Faisal College | Auburn |
| 641 | Mathematics Standard 2 | Roser, Lara Erin Mary | 9 | Caroline Chisholm College | Glenmore Park |
| 642 | Mathematics Standard 2 | Healey, Shae Violet | 10 | Caroline Chisholm College | Glenmore Park |
| 643 | Mathematics Standard 2 | Rodrigues, Kyle | 10 | Marist College Eastwood | Eastwood |
| 644 | Mathematics Standard 2 | Agosin, Ethan | 12 | Moriah College | Queens Park |
| 645 | Mathematics Standard 2 | Daoud, Juliette | 12 | St Charbels College | Punchbowl |
| 646 | Mathematics Standard 2 | Hudson, Lily | 12 | Loreto Normanhurst | Normanhurst |
| 647 | Mathematics Standard 2 | Neilson, William | 12 | Epping Boys High School | Eastwood |
| 648 | Mathematics Standard 2 | Pyliotis, Franklin | 12 | St Spyridon College Senior School | Maroubra |
| 649 | Mathematics Standard 2 | Sartena, Liam | 12 | Cranbrook School | Bellevue Hill |
| 650 | Mathematics Standard 2 | Vulkanovski, Emilia | 12 | St Ursulas College | Kingsgrove |