The Nizārī (Arabic النزاريون) are a sect of Ismā'īlī Shīˤa Islām.

The Nizāriyya differ from the Mustaˤliyya in that they believe that the successor-Imām to the Fatimid caliph al-Mustansir was his elder son an-Nizār. However, the Fatimid Regent appointed al-Mustansir's younger son al-Mustaˤlī as caliph and as a result, an-Nizār died in prison when he attempted to claim the throne by rebellion.

One (in)famous group of Nizāriyya were the "Assassins" of Alamūt under the leadership of Dāˤī Hassan as-Sabbaħ ((c. 1034-1124)).

The current Nizārī Imām is His Highness The Prince Aga Khan IV, Mowlana Shah Karim al-Hussayni Hazir Imam.

Islam Ismailism | ニザール派 | Nizaris Nizariidid