Gertrude of Aldenberg was a 13th-century German noblewoman and Premonstratensian abbess. Born in Thuringia to Louis IV, Landgrave of Thuringia, and Elizabeth of Hungary, she was raised by the canonesses of the Abbey of Aldenberg after her mother left her there as a child. She was elected to lead the monastery at the age of 21 and served as its abbess for nearly five decades. She is recognized as a blessed in the Catholic Church.