Madog Crypl (or Madog Crippil), also known as Madog ap Gruffydd Fychan (c. 1275–1304/6) was the heir of the sovereign Princes of Powys Fadog and Lords of Dinas Bran. He is sometimes described as Madog III of Powys Fadog. However, he was only lord of some of the family lands under the English crown.