Portsmouth Langstone was a borough constituency in Portsmouth. It returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom, elected by the first past the post system.
The constituency was created for the 1950 general election, and abolished for the February 1974 general election.
The constituency was formed from the abolished constituencies of Portsmouth North and Fareham as well as Waterlooville from the Petersfield constituency
Wards renamed