Alyn and Deeside was one of six districts of Clwyd, North Wales from 1974 to 1996. There is still a parliamentary constituency of the same name.

Alyn and Deeside is a constituency of the House of Commons of the Parliament of the United Kingdom (Westminster). The constituency was created in 1997, and it elects one Member of Parliament (MP) by the first past the post method of election. The constituency has always elected Labour MPs, although in their landslide defeat of 1983, the Conservatives were able to mount a strong challenge.

Alyn and Deeside is a constituency of the National Assembly for Wales. It elects one Assembly Member by the first past the post method of election. Also, however, it is one of nine constituencies in the North Wales electoral region, which elects four additional members, in addition to nine constituency members, to produce a degree of proportional representation for the region as a whole.