Piccadilly Circus is a London Underground station located directly beneath Piccadilly Circus itself, with entrances at every corner. Located in Travel-card Zone 1, the station is on the Piccadilly line between Green Park and Leicester Square stations and on the Bakerloo line between Oxford Circus and Charing Cross stations.

The Bakerloo line is a London Underground line that runs from Harrow & Wealdstone in suburban north-west London to Elephant & Castle in south London, via the West End. Printed in brown on the Tube map, it serves 25 stations, 15 of which are underground, over 23.2 kilometres (14.4 mi). It runs partly on the surface and partly through deep-level tube tunnels.