Clapham Junction railway station

Clapham Junction (/ˈklæpəm ˈdʒʌŋkʃən/) is a major railway station near St John's Hill in south-west Battersea, in the London Borough of Wandsworth, England. It lies 2 miles 57 chains (2.71 mi; 4.37 km) from London Victoria and 3 miles 74 chains (3.93 mi; 6.32 km) from London Waterloo. Despite its name, Clapham Junction is not in Clapham, a district 1 mile (1.6 km) to the south-east.

A major transport hub, Clapham Junction station is on both the South West Main Line and Brighton Main Line, as well as numerous other routes and branch lines which pass through or diverge from the main lines at this station. It serves as a southern terminus of both the Mildmay and Windrush lines of the London Overground.

Routes from London's south and south-west termini, Victoria and Waterloo, funnel through the station, making it the busiest in Europe by number of trains using it: between 100 and 180 per hour, except for the five hours after midnight. The station is also the busiest UK station for interchanges between services, as well as the only railway station in Great Britain with more interchanges than entries or exits.