Muhammad Riaz Khan (Urdu:محمد ریاض خان) was a Pakistan Army general who was the 6th Director-General of the Inter-Services Intelligence (ISI), serving from October 1977 to April 1979.

[4] Riaz was well-regarded amongst the military establishment, and described as "religious minded, scrupulously honest, thoroughly professional and a committed soldier... a man of unimpeachable honesty and integrity.

"[4] Although he presided over the ISI for a short term, his tenure, which occurred during Zia's era, coincided with a tumultuous period in Pakistan–U.S.

relations: Bhutto's execution, the Carter administration's sanctions against Pakistan's nuclear program, the U.S. embassy burning in Islamabad, the Soviet buildup in Afghanistan, and the CIA's expanding cooperation with ISI.

[4] His son-in-law, Shahid Khaqan Abbasi, became a prominent politician and was appointed as the Prime Minister of Pakistan in 2017.