Walthamstow Central station in the context of "Interchange station"

Walthamstow (/ˈwɔːlθəmstoʊ/ WAWL-thəm-stoh or /ˈwɒlθəmstoʊ/ WOL-thəm-stoh) is a town within the London Borough of Waltham Forest in east London. The town borders Chingford to the north, Snaresbrook and South Woodford to the east, Leyton and Leytonstone to the south, and Tottenham to the west. At the 2011 census, Walthamstow had a population of approximately 109,424 and is around 7.5 miles (12 km)north-east of Central London.

Occupying most of the town's east-to-west High Street, Walthamstow Market is the longest outdoor market in Europe. East of the town centre is Walthamstow Village, the oldest part of Walthamstow, and the location of St Mary's Church, the town's parish church. To the north of the town is the former Walthamstow Stadium, which was considered an East End landmark. The William Morris Gallery in Forest Road, a museum that was once the family home of William Morris, is a Grade II* listed building. The town is served by five railway stations, including Walthamstow Central and Blackhorse Road—interchange stations on the Victoria line of the London Underground.

The Victoria line is a London Underground line that runs between Brixton in South London, and Walthamstow Central in the east, via the West End. It is printed in light blue on the Tube map and is one of the only two lines on the network to run completely underground, the other being the Waterloo & City line.

The line was constructed in the 1960s and was the first entirely new Underground line in London for 50 years. It was designed to reduce congestion on other lines, particularly the Piccadilly line and the Charing Cross branch of the Northern line. The first section, from Walthamstow Central to Highbury & Islington, opened in September 1968 and an extension to Warren Street followed in December. The line was completed to Victoria station in March 1969 and was opened by Queen Elizabeth II who rode a train from Green Park to Victoria. The southern extension to Brixton opened in 1971, and Pimlico (the only station in the line without an interchange) was added in 1972.