This is a list of rulers in Wales (Welsh: Cymru; and neighbouring regions) during the Middle Ages, between the 5th and 16th centuries. The rulers were monarchs who ruled their respective realms, as well as those who briefly ruled the Principality of Wales. These former territories are now within the boundaries of modern-day Wales and the neighbouring Welsh Marches in England (both in the United Kingdom).
Before the Edwardian Conquest, completed in 1283, Wales consisted of several independent realms, the most important being Gwynedd, Powys, Deheubarth (which was formed from lands belonging to Ceredigion, Dyfed and latterly Seisyllwg) and Morgannwg (formed from Glywysing and Gwent). Boundary changes and the custom of dividing patrimonies between heirs meant that few princes ever came close to ruling the whole of Wales.
