Alyn and Deeside (Welsh: Alun a Glannau Dyfrdwy) is a parliamentary constituency represented in the House of Commons of the Parliament of the United Kingdom (at Westminster). The constituency was created in 1983, and it elects one Member of Parliament (MP) by the first-past-the-post method of election. The Alyn and Deeside Senedd constituency was created with the same boundaries in 1999.