- Feb 2 Eric XI of Sweden (b. 1216)
- Feb 8 Robert I of Artois, French crusader (b. 1216)
- Feb 8 William II Longespee, dies as a martyr at the battle of Al Mansurah, Egypt (7th cruscade)
- May 2 Toeransa, sultan of Egypt, murdered
- Aug 9 King Eric IV of Denmark (b. 1216)
- Aug 10 Erik IV Plovpenning, king of Denmark, murdered
- Oct 4 Herman VI, Margrave of Baden
- Dec 13 Frederick II, German Emperor (1212-1250), dies at 55