This article refers to the London postal district. For other meanings of E17, see E17 (disambiguation).

E17 is a London postal district in the Borough of Waltham Forest. It includes Walthamstow, Upper Walthamstow and Higham Hill. The district is bordered by the River Lee to the West, Lea Bridge Road to the South, Epping Forest to the East, and the A406 to the North.

This district was the basis for the name for the early 1990s boy band East 17.