Isma'ilism is a branch or sub-sect of Shia Islam.

Ismaili () or the variant Ismaily may also refer to:

Ismaili Ismaili (surname), individuals with the surname or patronymic Nizari Isma'ilism or al-Nizāriyyūn, a branch of the Ismaili Shi'i Muslims after the Twelvers Ismāʻīlī Constitution, a universal constitution governing the Ismaili Shia Muslims Ismaili Centre, a series of centres mainly belonging to Ismaili trends Ismaili Centre, Dushanbe, Tajikistan Ismaili Centre, London Ismaili Centre, Toronto, Ontario, Canada The Ismaili Centre, Burnaby, near Vancouver, British Columbia, Canada The Ismaili Centre, Lisbon Ismaili railway station, railway station located in Pakistan

Ismaily Ismaily, a Brazilian footballer Ismaily SC, an Egyptian sports club

See also Nizari Ismaili state, also called the Alamut State, a Shia Nizari Ismaili state founded by the Order of Assassins under Hassan-i Sabbah

Esmaili (disambiguation), a Persian-language variant of Ismaili