Isabella of Aragon (1247 – January 28, 1271), infanta of Aragon, was, by marriage, Queen consort of France in the Middle Ages from 1270 to 1271.

She was the daughter of James the Conqueror, king of Aragon, Valencia, and Majorca, and his second wife Violant of Hungary, daughter of Andrew II of Hungary. On May 28, 1262, she married the future Philip III of France, son of king Louis IX and Marguerite Berenger of Provence, in Clermont.

Their children were:
• Louis (1264-1276)
• Philip IV "the Fair" (1268-1314), king of France
• Robert (1269-c. 1276)
• Charles of Valois (1270-1325)

She accompanied her husband on the Eighth Crusade against Tunis, but died after falling from her horse on the way home, in Cosenza, Calabria, still pregnant with her fifth child. She was buried in Saint Denis Basilica. Her tomb, like many others, was desecrated during the French Revolution in 1793.