Bancroft's School is a co-educational private day school in Woodford Green, London. The school has around 1,100 pupils aged between 7 and 18, around 250 of whom are pupils of the Preparatory School and 850 of whom are pupils of the Senior School.

The school's alumni, called "Old Bancroftians", include naturalists, poets, academics, politicians, authors, sportsmen, actors, and military figures. These include two recipients of the Victoria Cross, Britain's highest military award for gallantry, Robert Edward Cruickshank and Augustus Charles Newman. More recently, alumni have included Lord Pannick KC, Mike Lynch, Alan Davies, Hari Kunzru, Anita Anand and Andy Saull.

The school was founded in 1737, following the death in 1728 of Francis Bancroft, who bequeathed a sizeable sum of money to the Drapers' Company, which continues to act as trustee for the school and as its governors. Bancroft's began in the Mile End Road in London's East End as a small charitable day school for boys, with an attached almshouse.

The foundation was originally known as Bancroft's Hospital and until the late 19th century also acted as home for almsmen who had been freemen of the Company of Drapers. In 1884 the almshouse was abolished and the school moved to a new site at Woodford Green and the original buildings were demolished; the site is now occupied by Queen Mary, University of London.

The current school location in Woodford Green occupies four and a half acres, and the main buildings were designed by Arthur Blomfield, who was also responsible for Selwyn College in Cambridge. Originally there were just a hundred pupils, including sixty boarders. The numbers grew steadily during the twentieth century until there were nearly one thousand on the roll. The buildings were also extended, with the original Science Block (1910) then further extended (1969/70 and officially opened by Solly Zuckerman, Baron Zuckerman), the Great Hall (1937), the Adams Building (Music Block) (1964), a new Gymnasium Block (1975), the Preparatory School (1990), the Courtyard Building (2006), new Sports Block (2007), and Preparatory School Extension (2009).

Following the Education Act 1944, Bancroft's became a direct grant grammar school. However, the removal of this status in the 1970s prompted the governors to decide on three courses of action: to discontinue boarding, to admit girls for the first time and become fully independent. Some years later the decision was also taken to build a new preparatory school. These were all completed by 1990; the school now takes half its pupils from age 7, and half the pupils are now girls. In 1997, the government abolished the Assisted Places Scheme, which had helped children from poor families to attend the school; the governors replaced these by Francis Bancroft Scholarships, which were supported by the Drapers' Company and by the residue of Francis Bancroft's original will.

Mary Ireland became head in January 2008, succeeding Peter Scott. It was announced in October 2015 that Ireland would be succeeded by Simon Marshall as head following the 2015–2016 academic year.

The school team won the Kids' Lit Quiz in 2009 at the world final in South Africa.