The City of London School (CLS) or City is a boys' independent day school on the banks of the River Thames in the City of London, England. It is the brother school of the City of London School for Girls (a girls' school within the City) and the co-educational City of London Freemen's School (a day and boarding school in Surrey).
The School was founded by a private Act of Parliament in 1834, following events starting from a bequest of land by John Carpenter, Town Clerk of London in 1442, for poor children in the City of London.