Constance of Portugal, Portuguese infanta (b. 1290)
Constance of Portugal (pt: Constança; 3 January 1290 – Sahagún, 18 November 1313; Portuguese pronunciation: [kõʃˈtɐ̃sɐ]), was Queen of Castile by her marriage to Ferdinand IV.

She was the eldest child and only daughter of King Denis of Portugal and his wife Elizabeth of Aragon, later Saint.