This is the NSW HSC Honour Roll, listing every award or prize won by New South Wales HSC students in 2020, along with their school and subject details.
The report includes all Distinguished Achiever awards, All Rounder awards, and Subject Top Achiever awards (with rankings). First in Course awards are shown as Subject Top Achiever awards with a ranking of '1' i.e. first place.
The report also includes significant Australian national awards and prizes such as the Australian Student Prize.
| 26295 | O'Leary, Ashleigh | Asquith Girls High School | Asquith | Legal Studies | DA | |
| 26296 | O'Leary, Ashleigh | Asquith Girls High School | Asquith | Music 1 | DA | |
| 26297 | O'Leary, Darcie | St Philips Christian College Port Stephens | Salamander Bay | Biology | DA | |
| 26298 | O'Leary, Darcie | St Philips Christian College Port Stephens | Salamander Bay | English Advanced | DA | |
| 26299 | O'Leary, Darcie | St Philips Christian College Port Stephens | Salamander Bay | English Extension 1 | DA | |
| 26300 | O'Leary, Darcie | St Philips Christian College Port Stephens | Salamander Bay | Legal Studies | DA | |
| 26301 | O'Leary, Darcie | St Philips Christian College Port Stephens | Salamander Bay | Modern History | DA | |
| 26302 | O'Leary, Darcie | St Philips Christian College Port Stephens | Salamander Bay | English Advanced | Subject rank | 16 |
| 26303 | O'Leary, Matthew | Marcellin College | Randwick | Personal Development, Health and Physical Education | DA | |
| 26304 | O'Leary, Thomas | St Augustines College | Brookvale | Mathematics Advanced | DA | |
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| 26305 | O'Loan, Finn | St Aloysius College | Milsons Point | All-rounder | ||
| 26306 | O'Loan, Finn | St Aloysius College | Milsons Point | Biology | DA | |
| 26307 | O'Loan, Finn | St Aloysius College | Milsons Point | Chemistry | DA | |
| 26308 | O'Loan, Finn | St Aloysius College | Milsons Point | Drama | DA | |
| 26309 | O'Loan, Finn | St Aloysius College | Milsons Point | English Advanced | DA | |
| 26310 | O'Loan, Finn | St Aloysius College | Milsons Point | Mathematics Advanced | DA | |
| 26311 | O'Loghlin, Bibi | St Vincents College | Potts Point | All-rounder | ||
| 26312 | O'Loghlin, Bibi | St Vincents College | Potts Point | Drama | DA | |
| 26313 | O'Loghlin, Bibi | St Vincents College | Potts Point | English Advanced | DA | |
| 26314 | O'Loghlin, Bibi | St Vincents College | Potts Point | English Extension 1 | DA | |
| 26315 | O'Loghlin, Bibi | St Vincents College | Potts Point | English Extension 2 | DA | |
| 26316 | O'Loghlin, Bibi | St Vincents College | Potts Point | Studies of Religion II | DA | |
| 26317 | O'Loghlin, Bibi | St Vincents College | Potts Point | Visual Arts | DA | |
| 26318 | O'Loughlin, Anjuna Moira | Loreto Kirribilli | Kirribilli | Mathematics Advanced | DA | |
| 26319 | O'Loughlin, Camille | Roseville College | Roseville | Geography | DA | |
| 26320 | O'Loughlin, Camille | Roseville College | Roseville | Visual Arts | DA | |
| 26321 | O'Loughlin, Cordella Bridget | Loreto Kirribilli | Kirribilli | English Advanced | DA | |
| 26322 | O'Loughlin, Cordella Bridget | Loreto Kirribilli | Kirribilli | English Extension 1 | DA | |
| 26323 | O'Loughlin, Cordella Bridget | Loreto Kirribilli | Kirribilli | Mathematics Advanced | DA | |
| 26324 | O'Loughlin, Cordella Bridget | Loreto Kirribilli | Kirribilli | Mathematics Extension 1 | DA | |
| 26325 | O'Loughlin, Cordella Bridget | Loreto Kirribilli | Kirribilli | Studies of Religion II | DA | |
| 26326 | O'Loughlin, Indiana Grace | Loreto Kirribilli | Kirribilli | Mathematics Advanced | DA | |
| 26327 | O'Loughlin, Jack Christopher | Elizabeth Macarthur High School | Narellan | Mathematics Standard 1 Examination | DA | |
| 26328 | O'Mahony, Zara | St Patricks College Sutherland | Sutherland | Construction Examination | DA | |
| 26329 | O'Mahony, Zara | St Patricks College Sutherland | Sutherland | Industrial Technology | DA | |
| 26330 | O'Mahony, Zara | St Patricks College Sutherland | Sutherland | Construction Examination | Subject rank | 1 |
| 26331 | O'Malley, Angus | St Edwards Christian Brothers College | East Gosford | Visual Arts | DA | |
| 26332 | O'Malley, Caitlin | Kambala | Rose Bay | Information Processes and Technology | DA | |
| 26333 | O'Malley, Caitlin | Kambala | Rose Bay | Legal Studies | DA | |
| 26334 | O'Malley, Luke | Rose Bay Secondary College | Dover Heights | Mathematics Extension 1 | DA | |
| 26335 | O'Malley, Luke | Rose Bay Secondary College | Dover Heights | Physics | DA | |
| 26336 | O'Mally, Madeleine Kate | Abbotsleigh | Wahroonga | Biology | DA | |
| 26337 | O'Mally, Madeleine Kate | Abbotsleigh | Wahroonga | Chemistry | DA | |
| 26338 | O'Mally, Madeleine Kate | Abbotsleigh | Wahroonga | Geography | DA | |
| 26339 | O'Mally, Madeleine Kate | Abbotsleigh | Wahroonga | Mathematics Extension 1 | DA | |
| 26340 | O'Neil, Louie James | St Ignatius College | Lane Cove | English Advanced | DA | |
| 26341 | O'Neil, Louie James | St Ignatius College | Lane Cove | Mathematics Extension 1 | DA | |
| 26342 | O'Neill, Adele Helen | Northern Beaches Secondary College Mackellar Girls Campus | Manly Vale | All-rounder | ||
| 26343 | O'Neill, Adele Helen | Northern Beaches Secondary College Mackellar Girls Campus | Manly Vale | Ancient History | DA | |
| 26344 | O'Neill, Adele Helen | Northern Beaches Secondary College Mackellar Girls Campus | Manly Vale | Biology | DA | |