Maredudd ap Bleddyn (1047 – 9 February 1132) was a prince and later King of Powys in eastern Wales. He was involved in the rebellions against Henry I of England, son of William the Conqueror, who launched the Norman invasion of Wales. He was featured in the Brut y Tywysogion, and was succeeded by his son, Prince Madog ap Maredudd.