Ali I may refer to:

  • Ali ibn Idris (died 848), Idrisid sultan of the Western Maghreb
  • Baba Ali Chaouch (died 1718), Dey-Pacha, or sultan of Algiers.
  • Ali of Hejaz (1879–1935), king of Hejaz from 1924 to 1925
  • Ali Vâsib (1903–1983), titular Sultan of Turkey and Ottoman Caliph from 1977 to 1983 under the name 'Ali I