Edmund Crouchback, 1st Earl of Leicester and Lancaster (16 January 1245 – 5 June 1296), is the second surviving son of King Henry III of England and Eleanor of Provence.

In his childhood, he has a claim on the Kingdom of Sicily.

His nickname "Crouchback" (meaning "Crossback") refers to his participation in the Ninth Crusade indicating that he is entitled to wear a cross stitched into the back of his garments.