List of parliamentary constituencies in Gwynedd

Three constituencies cover the preserved county of Gwynedd for the House of Commons of the UK Parliament (Westminster), and are used also for elections to the Senedd.

The preserved county of Gwynedd shares its name with the southern bulk, the principal area, Gwynedd, Anglesey (Welsh: Ynys Môn), forms a second principal area, i.e. has its own local government council.

Although the proposals were immediately laid before Parliament they were not brought forward by the Government for approval.

On 24 March 2020, the Minister of State for the Cabinet Office, Chloe Smith, issued a written statement to Parliament setting out the Government's thinking with regard to parliamentary boundaries.

Conservative Labour Plaid Cymru 1parts transferred in 2024 to the constituency of Bangor Aberconwy which lies mostly in Clwyd