Saint Mildgyth (or Mildgytha) (Old English: Mildgȳð) (died 676) was the youngest daughter of Merewalh, king of Mercia and Saint Eormenburh. She was the youngest sister of Saint Mildburh of Wenlock and Saint Mildrith. The three sisters have been likened to the three theological virtues: Mildburh to faith, Mildgyth to hope, and Mildrith to charity. Her feast day is 17 January.