Walthamstow was a local government district in southwest Essex, England from 1873 to 1965, around the town of Walthamstow. It was within the London suburbs, forming part of the London postal district and Metropolitan Police District. Its former area now corresponds to the central part of the London Borough of Waltham Forest in Greater London. Its population and area grew rapidly as London continued to develop its suburbs.

Walthamstow is a town in the London Borough of Waltham Forest, around 7.5 miles (12 km) east of Central 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, the town had a population of approximately 109,424.