Jürgen Oldenstein (born 1947 in Düsseldorf ) is a German provincial Roman archaeologist.
In 1974 he received his doctorate in Frankfurt with a dissertation Zur Ausrüstung römischer Auxiliareinheiten ("On the equipment of Roman auxiliary units") and then worked from 1975 to 1979 as a research assistant at the Römisch-Germanischen Kommission of the German Archaeological Institute in Frankfurt.
In 1979 he became an academic assistant at the Institute for Pre- and Protohistory of the Johannes Gutenberg-Universität Mainz.
In 1992 he was received his Habilitation in Mainz ("Venia legendi" for Pre- and Early History with special consideration of Roman provincial archeology).
From 2002 to 2010 Oldenstein was Vice President of the University of Mainz for Study and Teaching.