Constance of Castile (1141 – 4 October 1160) was the second wife of Louis VII, King of France, following his divorce from Eleanor of Aquitaine. She was a daughter of Alphonse VII, King of Galicia, León and Castile, and Berenguela of Barcelona. Her maternal grandparents were Ramon Berenguer III, Count of Barcelona and his third wife Dulce Aldonza Milhaud.
The official reason for her husband's divorce from Eleanor of Aquitaine had been that he was too close a relative of Eleanor for the marriage to be legal by Church standards; however, he was even more closely related to Constance.
Constance died giving birth to her second child. Desperate for a son, her husband remarried a mere five weeks after her death.
Constance was buried in the Basilica of Saint-Denis, France.