Umm Muḥammad bint Ṣāliḥ (Arabic: أم محمد بنت صالح) was an Abbasid princess, niece of third Abbasid caliph al-Mahdi and wife of caliph Harun al-Rashid.
Her full name was Umm Muhammad bint Salih al-Miskin ibn Abdallah al-Mansur.
Umm Muhammad was the wife of the Abbasid caliph Harun al-Rashid.
Umm Muhammad became the second wife of Harun al-Rashid from the Abbasid house.
His first wife Zubaidah bint Ja'far was also an Abbasid princess and granddaughter of al-Mansur.