List of former United Kingdom Parliament constituencies

This is a list of former Parliamentary constituencies in the United Kingdom, organised by date of abolition. It includes UK Parliamentary constituencies that have been abolished, including those that were later revived, but does not include constituencies that were merely renamed.

The date of creation of a constituency, in some cases, goes back to English and Welsh seats in the Parliament of England and the Scottish constituencies in the Parliament of Great Britain.

In some cases, constituencies in the unreformed House of Commons first received a summons to send representatives to Parliament at a date considerably earlier than the date after which they consistently received a summons. These cases are indicated in a note.

No account is taken, in this article, of the temporary redistribution of constituencies used for the First and Second Protectorate Parliaments in the 1650s. See First Protectorate Parliament for a list of those constituencies.

The Scottish UK Parliamentary constituencies were reorganised following the creation of the Scottish Parliament, in order to remove the traditional over-representation put in place to compensate for the lack of national representation.

The Boundary Commissions' Fourth Periodical Review was completed in 1995. It recommended various changes, although most of the abolitions resulting from these took place in Scotland.

Due to the rapid expansion, the town of Milton Keynes, the Boundary Commission for England exceptionally recommended in 1990, between reviews, that it should be divided between two new constituencies.

The Boundary Commissions' Third Periodical Review was completed in 1983, fourteen years after the previous review. It proposed wider changes than the two earlier reviews and abolished a large number of constituencies, although many constituencies were simply renamed to conform to local government districts created in 1974.

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