Ismail Mustafa, Ismail Effendi Mustafa, Ismail Bey Mustapha, Ismail Mustafa al-Falaki or Ismail Pasha al-Falaki (1825 – 27 July 1901) was an Egyptian astronomer and mathematician. Effendi, Bey and Pasha corresponded to the different ranks he attained along his career; "al-Falaki" was added to his name literally meaning "the astronomer". He was born in Cairo to a family of Turkish origin and was educated in Paris, France.