Piccadilly Circus is a busy plaza in the heart of London at the junction of five major streets: Regent Street, Shaftesbury Avenue, Piccadilly and Covent Street.

Piccadilly Circus is a famous road junction and public space of London's West End in the City of Westminster, built in 1819 to connect Regent Street with the major shopping street of Piccadilly. In this context, a circus, from the Latin word meaning "circle", is a round open space at a street junction.