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 National Assembly for Wales. The current boundaries have been effective since the Welsh Assembly election, 2007 and the 2010 United Kingdom general election..

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.

For Welsh Assembly elections, the constituencies each elect one assembly member and are grouped into additional-member electoral regions, in this instance the region is North Wales.

As part of the Sixth Periodic Review of Westminster constituencies the Boundary Commission for Wales proposed changes to almost all the existing Welsh Westminster constituencies, giving some of them Welsh language names.

The North Wales region also includes seven Clwyd constituencies. The Mid and West Wales region also includes five Dyfed constituencies and two Powys constituencies.

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