Portsmouth West was a borough constituency in the city of Portsmouth in Hampshire, England. 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 voting 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 Portsmouth Central
Wards renamed
After the Second periodic review of Westminster constituencies, Buckland and Fratton wards were transferred to Portsmouth South, while the bulk of the seat was combined with parts of Portsmouth Langstone to form the re-established constituency of Portsmouth North.