|1217 by topic|
|Political entities - State leaders - Religious leaders|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Art and literature|
|1217 in poetry|
|Ab urbe condita||1970|
|Balinese saka calendar||1138–1139|
|English Regnal year||1 Hen. 3 – 2 Hen. 3|
|Chinese calendar||丙子年 (Fire Rat)
3913 or 3853
— to —
丁丑年 (Fire Ox)
3914 or 3854
|- Vikram Samvat||1273–1274|
|- Shaka Samvat||1138–1139|
|- Kali Yuga||4317–4318|
|Japanese calendar||Kenpō 5
|Minguo calendar||695 before ROC
|Thai solar calendar||1759–1760|
1343 or 962 or 190
— to —
1344 or 963 or 191
|Wikimedia Commons has media related to 1217.|
- Mukhali returns to Genghis Khan's camp in Mongolia, and receives the hereditary title of prince, a golden seal, and a white standard with 9 tails and a black crescent in the middle. He is appointed commander in chief of operations in North China.
- The Fifth Crusade reaches the Holy Land.
- April 9 – Peter II of Courtenay is crowned emperor of the Latin Empire of Constantinople at Rome, by Pope Honorius III.
- May 20 – First Barons' War in England: Occupying French forces are defeated at the Battle of Lincoln, by English royal troops led by William Marshal, Earl of Pembroke, and survivors are forced to flee south.
- June 6 – King Henry I of Castile dies aged 13, from the fall of a roof tile in Palencia, an event which his regent, Álvaro Núñez de Lara, attempts to conceal. Henry's sister Berengaria succeeds to the throne.
- June – Haakon Haakonsson becomes King Haakon IV of Norway, following the death of Inge II, and largely ends the civil war era in Norway, reigning until 1263.
- August 24 – First Barons' War: In the Battle of Sandwich in the English Channel, English forces destroy the French, and the French mercenary Eustace the Monk is captured and beheaded.
- August 31 – Ferdinand becomes King of Castile, upon the abdication of his mother Berengaria.
- September 12 – The First Barons' War in England is ended by the Treaty of Kingston upon Thames; The French and Scots are to leave England, and an amnesty is granted to rebels.
- September 20 – The Treaty of Lambeth is signed, ratifying the Treaty of Kingston.
- September 21 – Livonian Crusade: The Livonian Brothers of the Sword and allied Livs and Letts defeat the Estonian army in the Battle of St. Matthew's Day, and kill their leader Lembitu.
- October 18 – Fifth Crusade, Reconquista: Alcácer do Sal is reconquered by the troops of King Afonso II of Portugal.
- November – In the Kingdom of Castile, former regent Álvaro Núñez de Lara is captured, and forced to relinquish all his castles.
- Stefan Nemanjić is elevated to be the first King of the Serbian lands by Pope Honorius III, and crowned by Stefan's brother, Archimandrite Sava, in Žiča.
- A decree made in England establishes that only Englishmen can be clergy of Ireland.
- May 3 - Henry I of Cyprus
- date unknown
- April 23 – King Inge II of Norway (b. 1185)
- April 25 – Hermann I, Landgrave of Thuringia
- June 6 – Henry I, king of Castile (b. 1204)
- August 24 – Eustace the Monk, French mercenary and pirate (b. c.1170)
- September 10 – William de Redvers, 5th Earl of Devon, English nobleman
- September 21 – Lembitu of Lehola, Estonian resistance leader and Caupo of Turaida, Livonian leader (at the Battle of St. Matthew's Day)
- October 14 – Isabella, Countess of Gloucester, spouse of King John of England (b. c.1173)
- Maria Comnena, Queen consort of Jerusalem, spouse of Amalric I of Jerusalem (b. c.1154) (latest possible date of death)
- Lovers of Teruel: Juan Martinez (aka Diego Marcilla) and Isabel Segura (alleged date)
- Palmer, Alan; Veronica (1992). The Chronology of British History. London: Century Ltd. pp. 77–79. ISBN 0-7126-5616-2.
- Picard, Christophe (2000). Le Portugal musulman (VIIIe-XIIIe siècle. L'Occident d'al-Andalus sous domination islamique. Paris: Maisonneuve & Larose. p. 110. ISBN 2-7068-1398-9.
- Linehan, Peter (1999). "Chapter 21: Castile, Portugal and Navarre". In David Abulafia. The New Cambridge Medieval History c.1198-c.1300. Cambridge: Cambridge University Press. pp. 668–671. ISBN 0-521-36289-X.