Augustino Oldoini SJ (6 June 1612 – 23 March 1683) was an Italian Jesuit teacher, Church historian and bibliographer.
His first work, "Alcune difficoltà principali della grammatica" (Ancona, 1637), dealing with Latin grammar, was written while he was engaged in teaching the humanities.
He prepared a new annotated edition of the "History of the Popes" by Alphonsus Ciacconius, up to Clement IX (1667-9), "Vitæ et res gestæ Pontificum Romanorum et S.R.E.
J. Meuschen published an excerpt from Oldoini's "Catalogus eorum qui de Romanis Pontificibus scripserunt", in his work "Ceremonialia electionis Pontificum Romanorum" (Frankfort, 1731).
Oldoini also published "Athenæum Augustum, in quo Perusinorum scripta publice exponuntur" (Perugia, 1680) and "Athenæum Ligusticum seu Syllabus Scriptorum Ligurum necnon Sarzanensium ac Cyrnensium rei publicæ Genuensis Subditorum" (Perugia, 1680).