| 2006 | Catherine McAuley Westmead | Westmead | Mathematics Extension 1 | 4 |
| 2007 | Catherine McAuley Westmead | Westmead | Society and Culture | 4 |
| 2008 | Central Coast Grammar School | Erina Heights | Biology | 4 |
| 2009 | Central Coast Grammar School | Erina Heights | English (Advanced) | 4 |
| 2010 | Central Coast Grammar School | Erina Heights | General Mathematics | 4 |
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| 2011 | Cerdon College | Merrylands | English Extension 1 | 4 |
| 2012 | Chatswood High School | Chatswood | English (Advanced) | 4 |
| 2013 | Chatswood High School | Chatswood | Society and Culture | 4 |
| 2014 | Cheltenham Girls High School | Beecroft | Design and Technology | 4 |
| 2015 | Cheltenham Girls High School | Beecroft | Economics | 4 |
| 2016 | Cheltenham Girls High School | Beecroft | General Mathematics | 4 |
| 2017 | Cherrybrook Technology High School | Cherrybrook | Accounting | 4 |
| 2018 | Cherrybrook Technology High School | Cherrybrook | Earth and Environmental Science | 4 |
| 2019 | Cherrybrook Technology High School | Cherrybrook | English Extension 2 | 4 |
| 2020 | Cherrybrook Technology High School | Cherrybrook | Japanese Beginners | 4 |
| 2021 | Chester Hill High School | Chester Hill | Mathematics | 4 |
| 2022 | Chevalier College | Burradoo | English Extension 1 | 4 |
| 2023 | Chevalier College | Burradoo | Visual Arts | 4 |
| 2024 | Christadelphian Heritage College Sydney | Kemps Creek | Music 1 | 4 |
| 2025 | Christian Brothers High School Lewisham | Lewisham | Ancient History | 4 |
| 2026 | Christian Brothers High School Lewisham | Lewisham | Studies of Religion I | 4 |
| 2027 | Clancy Catholic College | West Hoxton | Community and Family Studies | 4 |
| 2028 | Coffs Harbour Senior College | Coffs Harbour | General Mathematics | 4 |
| 2029 | Colo High School | North Richmond | Earth and Environmental Science | 4 |
| 2030 | Concord High School | Concord | Earth and Environmental Science | 4 |
Source: NSW Education Standards Authority (NESA).
Supplementary data from school publications.
Supplementary data from school publications.
Last Updated: 14 Jan 2022