This report shows the 2025 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 | Community and Family Studies | Yeun, Callista Trinity | 8 | Castle Hill High School | Castle Hill |
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| 2 | French Beginners | Wright, Tabitha Lindsay | 4 | Castle Hill High School | Castle Hill |
| 3 | Legal Studies | Joseph, Alyssa Siby | 9 | Castle Hill High School | Castle Hill |
| 4 | Legal Studies | Khan, Adaya Anas | 19 | Castle Hill High School | Castle Hill |
| 5 | Retail Services Examination | Choi, Woojin William | 4 | Castle Hill High School | Castle Hill |
| 6 | Software Engineering | Pabilona, Matthew Tan | 6 | Castle Hill High School | Castle Hill |