As with all seats it elected one Member of Parliament (MP) by the first past the post system at least every five years.

2010–2024: The Denbighshire County electoral divisions of Bodelwyddan, Denbigh Central, Denbigh Lower, Denbigh Upper/Henllan, Dyserth, Llandyrnog, Prestatyn Central, Prestatyn East, Prestatyn Meliden, Prestatyn North, Prestatyn South West, Rhuddlan, Rhyl East, Rhyl South, Rhyl South East, Rhyl South West, Rhyl West, St Asaph East, St Asaph West, Trefnant, and Tremeirchion.

It wasin the north of Wales, containing the seaside town of Prestatyn and its coastal neighbour Rhyl which is overlooked by the community of Rhuddlan.

It also contained the inland towns of Denbigh, St Asaph, Bodelwyddan, Trefnant and Tremeirchion.

In 2019 general election, the seat reverted to the Conservatives as the party made gains from Labour in north east Wales.