| Joan | |
|---|---|
 | |
| Queen consort of Castile and León | |
| Tenure | 1237–1252 |
| Countess of Ponthieu | |
| Reign | 1251–1279 |
| Predecessor | Marie |
| Successor | Eleanor |
| Countess of Aumale | |
| Reign | 1239–1279 |
| Predecessor | Simon |
| Successor | John I |
| Born | 1220 |
| Died | 16 March 1279 (aged 58–59) Abbeville, France |
| Spouse | Ferdinand III of Castile Jean de Nesle, Seigneur de Falvy et de La Hérelle |
| Issue Detail | Ferdinand II, Count of Aumale Eleanor, Queen of England |
| House | Dammartin |
| Father | Simon, Count of Aumale |
| Mother | Marie, Countess of Ponthieu |
Joan of Dammartin (French: Jeanne; c. 1220 – 16 March 1279) was Queen of Castile and León by marriage to Ferdinand III of Castile. She also ruled as Countess of Ponthieu (1251–1279) and Aumale (1237–1279). Her daughter, the English queen Eleanor of Castile, was her successor in Ponthieu. Ferdinand II, Count of Aumale, her son and co-ruler in Aumale, predeceased her, thus she was succeeded by her grandson John I, Count of Aumale.