Clementia of Hungary (French: Clémence; 1293–13 October 1328) was Queen of France and Navarre as the second wife of King Louis X.

The family claimed Hungary through Mary, and so although Clementia was born and grew up in Naples, she was considered a Hungarian princess.

Since there had been no formal annulment, Margaret technically became queen consort when Louis acceded to the throne upon Philip's death, though she was kept locked up.

She was buried on 15 October in the now-demolished church of the Couvent des Jacobins in Paris, and her effigy is now in the Basilica of St Denis.

Her many crown jewels, reliquaries, the textiles that decorated her domestic space and her chapel, the silver sculptures she owned, and even her clothing are all described.

[4][5] Clementia is a character in Les Rois maudits (The Accursed Kings), a series of French historical novels by Maurice Druon.