Muhyi ad-Din Muzaffar Jang Hidayat (died 13 February 1751) was the third Nizam of Hyderabad from 1750 until his death in 1751.

He was born to Nawab Mutawassil Khan Rustum Jung Bahadur, who was the Naib Subahdar (Deputy Governor) of Bijapur and his wife Sahibzadi Khair-un-nisa Begum, who was the daughter of Nizam-ul-Mulk.

When his grandfather Nizam-ul-Mulk died in 1748, he decided to stake his claim to the throne in opposition to his uncle, Nasir Jung.

[4]: 51 At this critical juncture in history the French commander De Bussy made the decision to install Salabat Jung as the new Nizam.

[5] Muzaffar Jung had only one son, Nawab Muhammad Sa'ad ud-din Khan Bahadur, who was a minor at the death of his father in February 1751.