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.
| 6894 | Costa, Maya | Springwood High School | Faulconbridge | Visual Arts | DA | |
| 6895 | Costa, Sofia | MLC School | Burwood | Dance | DA | |
| 6896 | Costa, Sofia | MLC School | Burwood | Modern History | DA | |
| 6897 | Costandi, Daniel | St Patricks College Sutherland | Sutherland | Construction Examination | DA | |
| 6898 | Costandi, Daniel | St Patricks College Sutherland | Sutherland | Design and Technology | DA | |
| 6899 | Costarella, Claudia Rose | St Marys Senior High School | St Marys | Biology | DA | |
| 6900 | Costello, Jasmine | Stella Maris College | Manly | Mathematics Standard 2 | DA | |
| 6901 | Costello, Jasmine | Stella Maris College | Manly | Textiles and Design | DA | |
| 6902 | Costello, Jasmine | Stella Maris College | Manly | Textiles and Design | Subject rank | 9 |
| 6903 | Costello, Niara | Young High School | Young | Korean Beginners | DA | |
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| 6904 | Costello, Sarah | Northern Beaches Secondary College Manly Campus | North Curl Curl | Mathematics Advanced | DA | |
| 6905 | Costello, Sophia | Wenona School | North Sydney | All-rounder | ||
| 6906 | Costello, Sophia | Wenona School | North Sydney | Economics | DA | |
| 6907 | Costello, Sophia | Wenona School | North Sydney | English Advanced | DA | |
| 6908 | Costello, Sophia | Wenona School | North Sydney | Geography | DA | |
| 6909 | Costello, Sophia | Wenona School | North Sydney | Legal Studies | DA | |
| 6910 | Costello, Sophia | Wenona School | North Sydney | Mathematics Advanced | DA | |
| 6911 | Costello, Sophia | Wenona School | North Sydney | Mathematics Extension 1 | DA | |
| 6912 | Cotrona, Ella | Northholm Grammar School | Arcadia | English Advanced | DA | |
| 6913 | Cotrona, Ella | Northholm Grammar School | Arcadia | Legal Studies | DA | |
| 6914 | Cotrona, Ella | Northholm Grammar School | Arcadia | Mathematics Standard 2 | DA | |
| 6915 | Cotrona, Ella | Northholm Grammar School | Arcadia | Society and Culture | DA | |
| 6916 | Cottell, Samara | St Vincents College | Potts Point | Drama | DA | |
| 6917 | Cotter, Eloise Mary | Marist Sisters College Woolwich | Woolwich | Studies of Religion II | DA | |
| 6918 | Cotterill, Evie | Tuggerah Lakes Secondary College The Entrance Campus | Shelly Beach | Biology | DA | |
| 6919 | Cotterill, Evie | Tuggerah Lakes Secondary College The Entrance Campus | Shelly Beach | Personal Development, Health and Physical Education | DA | |
| 6920 | Cotterill, Evie | Tuggerah Lakes Secondary College The Entrance Campus | Shelly Beach | Society and Culture | DA | |
| 6921 | Cottier, Lucy | Bethany College | Hurstville | Community and Family Studies | DA | |
| 6922 | Cottier, Lucy | Bethany College | Hurstville | Legal Studies | DA | |
| 6923 | Cottle, Aaron | Gosford High School | Gosford | Mathematics Advanced | DA | |
| 6924 | Cottle, Aaron | Gosford High School | Gosford | Music 2 | DA | |
| 6925 | Cotton, Harrison | Parramatta Marist High School | Westmead | Mathematics Standard 2 | DA | |
| 6926 | Cotton, Harrison | Parramatta Marist High School | Westmead | Music 1 | DA | |
| 6927 | Cotton, Henry | Marcellin College | Randwick | Business Studies | DA | |
| 6928 | Cotton, Henry | Marcellin College | Randwick | Mathematics Standard 2 | DA | |
| 6929 | Cotton, Henry | Marcellin College | Randwick | Software Design and Development | DA | |
| 6930 | Cottrell-Dormer, Claire | Our Lady of Mercy College Parramatta | Parramatta | Legal Studies | DA | |
| 6931 | Cottrill, Lachie | Ballina Coast High School | Ballina | Chemistry | DA | |
| 6932 | Cottrill, Lachie | Ballina Coast High School | Ballina | Physics | DA | |
| 6933 | Coughlin, Tegan Louise | Abbotsleigh | Wahroonga | Business Studies | DA | |
| 6934 | Coughlin, Tegan Louise | Abbotsleigh | Wahroonga | Geography | DA | |
| 6935 | Coughlin, Tegan Louise | Abbotsleigh | Wahroonga | Personal Development, Health and Physical Education | DA | |
| 6936 | Coulson, Harry | Mosman High School | Mosman | Mathematics Standard 2 | DA | |
| 6937 | Coulson-Knight, Megan | St John The Evangelist Catholic High School | Nowra | Music 1 | DA | |
| 6938 | Coulton, Alexandra | St Andrews Cathedral School | Sydney | Drama | DA | |
| 6939 | Coulton, Alexandra | St Andrews Cathedral School | Sydney | Music 2 | DA | |
| 6940 | Coulton, Alexandra | St Andrews Cathedral School | Sydney | Music Extension | DA | |
| 6941 | Coumbis, Lani | St Clares College | Waverley | Hospitality Examination | DA | |
| 6942 | Couper, Zach | Northern Beaches Secondary College Freshwater Campus | Freshwater | Chemistry | DA | |
| 6943 | Couper, Zach | Northern Beaches Secondary College Freshwater Campus | Freshwater | Geography | DA | |