"London Bridge Is Falling Down" is a traditional English nursery rhyme and singing game, which is found in different versions all over the world. It deals with the dilapidation of London Bridge and attempts, realistic or fanciful, to repair it. It may date back to bridge-related rhymes and games of the Late Middle Ages, but the earliest records of the rhyme in English are from the 17th century. The lyrics were first printed in close to their modern form in the mid-18th century and became popular, particularly in Britain and the United States, during the 19th century.

A nursery rhyme is a traditional poem or song for children in Britain and many other countries, but usage of the term dates only from the late 18th/early 19th century. The term Mother Goose rhymes is interchangeable with nursery rhymes.