Alyn and Deeside is a constituency of the Senedd. It elects one Member of the Senedd 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.

Jack Sargeant is a Welsh Labour Party politician, and a Member of the Senedd (MS). He represents the Alyn and Deeside constituency, where he succeeded his father Carl Sargeant following the February 2018 by-election.