Swansea West is a constituency of the House of Commons of the Parliament of the United Kingdom. It elects one Member of Parliament (MP) by the first past the post system of election, and is currently represented by Geraint Davies of Labour Co-op, who was first elected in the constituency in 2010.

Swansea West is a constituency of the Senedd. It elects one Member of the Senedd by the first past the post method of election. It is also one of seven constituencies in the South Wales West electoral region, which elects four additional members, in addition to seven constituency members, to produce a degree of proportional representation for the region as a whole.