James Ruse Agricultural College at Carlingford headed the 2021 HSC rankings as it has done since 1996. Second in the rankings was North Sydney Boys, third Baulkham Hills High and fourth Cherrybrook Technology High.
HSC First in Course Merit List featured several local students from schools in the area:
- Agriculture: Oscar Dong: James Ruse High, Carlingford.
- Geography: Sarah Wilson, The Hills Grammar, Kenthurst
- Korean Beginners: Andrew Suhaili, Baulkham Hills High.
- Advanced Maths: Kevin Wong, The King’s School, North Parramatta
- Mathematics Ext II: Luchith Yahan Thenuwara, Baulkham Hills High
- Music 2: Joseph Clemmit, Northolm Grammar, Arcadia
- Religious Studies II: Hannah Cook, Oakhill College, Castle Hill
Sarah Wilson from The Hills Grammar also received band 6 in Geography, Economics, Advanced English, Advanced Mathematics, Japanese Continuers and Japanese Extension.
Andrew Suhaili, from Baulkham Hills High received band 6 in Advanced English, Mathematics Extension 1, Mathematics Extension 2, Music Extension as well as Korean Beginners.
Luchith Yahan Thenuwara from Baulkham Hills High received band 6 in Chemistry, English Advanced, Mathematics Extension 1, Mathematics Extension 2 and Physics
Joseph Clemmit, Northolm Grammar School, English Advanced, Legal Studies, Mathematics Extension 1 and Music 2.