The City of London School for Girls (CLSG) is a private school in the Barbican in the City of London. It is the partner school of the all-boys City of London School and the City of London Freemen's School. All three schools receive funding from the City's Cash. It is a member of the Headmasters' and Headmistresses' Conference (HMC) and the Girls' Schools Association.

The Barbican Estate, or Barbican, is a residential complex of around 2,000 flats, maisonettes, and houses in central London, England, within the City of London. It is in an area once devastated by World War II bombings and densely populated by financial institutions, 1.4 miles (2.2 km) north east of Charing Cross. Originally built as rental housing for middle and upper-middle-class professionals, it remains an upmarket residential estate. It contains, or is adjacent to, the Barbican Arts Centre, the Museum of London, the Guildhall School of Music and Drama, the Barbican public library, the City of London School for Girls and a YMCA, forming the Barbican Complex.