The Battersea Tangle is a complex set of railway lines and junctions in Battersea, south of the River Thames in London. It grew up around the lines built to reach Waterloo and Victoria stations (and earlier termini) by several competing and cooperating railway companies. It has included a number of goods depots, as well as engine sheds, carriage sidings, and larger railway workshops. It is sometimes referred to as Clapham Junction, after its principal station.
Most of the routes were established between 1838 and 1867, after which time the development of the surrounding area made new lines impractical. New goods depots were added after this date, and the track alignments and junctions were adjusted to meet changing requirements. A new flyover, above existing tracks, was added in 1990 to allow Eurostar trains to reach Waterloo.