Islington East was a constituency which returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom from 1885, until it was abolished for the February 1974 general election.

Islington was a civil parish and metropolitan borough in London, England. It was an ancient parish within the county of Middlesex, and formed part of The Metropolis from 1855. The parish was transferred to the County of London in 1889 and became a metropolitan borough in 1900. It was amalgamated with the Metropolitan Borough of Finsbury to form the London Borough of Islington in Greater London in 1965.