The St Margaret's senior girls campus and co-educational junior school are both located in Berwick.

The head of campus is Steven Middleton, with the current school principal being Annette Rome.

BGS has approximately 180 enrolled students and is part of the Victorian School of Performing Arts.

Berwick Grammar School was opened by then Governor of Victoria, David de Kretser, on 9 November 2009.

Each year they compete in numerous inter-house competitions to win the annual house cup.