King's Cross St Pancras is a London Underground station on Euston Road in the London Borough of Camden, Central London. It serves King's Cross and St Pancras main line stations in London fare zone 1, and is served by six lines: Circle, Hammersmith & City, Metropolitan, Northern, Piccadilly and Victoria. The station was one of the first to open on the network. As of 2024, it is the 2nd busiest station on the network for passenger entrances and exits combined.