Kandjeng Pangeran Aria Adipati Achmad Djajadiningrat (EYD is Achmad Jayadiningrat) (born in Pandeglang, August 16, 1877) was a prominent colonial Indonesian bureaucrat who served as Regent of Serang (1901-1924), and subsequently of Batavia (1924-1929).
He was also a member of the Volksraad (or colonial legislature) of the Dutch East Indies.