Sydney Grammar School is an independent secular school for boys located in Sydney, Australia.

Sydney Grammar is a private school. Each year up to 26 full scholarships are offered to students who show academic promise and who perform well in the scholarship examination. It is also regarded for its strong academic results: for example, in national government testing (‘NAPLAN’ testing), it is one of the best performing private school nationwide, and a high performer in the New South Wales Higher School Certificate with over 50% of graduates receiving a 95 ATAR (‘Australian Tertiary Admissions Ranking’) or higher between 2009 and 2023.

Sydney Grammar is located near the Sydney central business district. The campus is compact and consists of multi-storey buildings (of up to eight floors) in a concrete landscape setting. Sydney Grammar is situated on the eastern side of Sydney’s Hyde Park, next to the Australian Museum, and extends from College Street to Yurong Street. The designs of the school’s buildings illustrate many different architectural eras: “Big School” (dating from the early 19th century colonial era), the Blacket buildings (annexed onto either side of “Big School” and completed in the 1850s), the original Science building (1891), the Science laboratory block (1960s), the Palladium building (an example of 1970s Modernist architecture), the Stanley Street building and Alastair Mackerras Theatre (1980s), and the A. B. ‘Banjo’ Paterson Library (1990s).

Weigall Sports Ground overlook

Weigall, the school’s sportsground (named after former Headmaster Albert Bythesea Weigall), is located at Rushcutters Bay next to the Edgecliff Preparatory School and includes tennis courts, cricket nets and three fields for cricket, rugby and football. It is routinely used for Saturday sports matches, physical education and as a recreational area for Grammar’s Edgecliff Preparatory School next door. There is also a large gymnasium at College Street and full rowing facilities at the school’s boatshed at Gladesville.

In May 2005, Headmaster John Vallance announced that the school would lead a consortium to purchase 30 Alma Street Paddington, known as White City, from Tennis New South Wales, thus extending the Weigall grounds substantially. In 2006, development applications to subdivide the White City tennis courts (numbered DA 20/2006 and DA 302/2006) were lodged with Woollahra Council to develop the site to accommodate more tennis and basketball courts; these were subsequently passed.

On 14 June 2008 the new field now known as Weigall 4 was opened with a range of guests including Frank Lowy, president of Football Federation Australia.

In 2009, the school began the construction of a new, underground multi-purpose hall featuring a seating capacity of over 1,500 seats, now called the John Vallance Hall (formerly The New Hall from its opening until 2017). Completed in August 2011, it was primarily designed to accommodate the entirety of the current students and teaching staff under one roof while being acoustically sound for orchestral performances. The hall was officially opened by the headmaster on 18 August 2011 with a celebratory concert featuring performances from a large number of Grammar boys past and present. The John Vallance Hall is now used by the two preparatory schools as well.