Dietmar Werner Winkler (born April 15, 1963, in Wolfsberg in Carinthia) is an Austrian scholar of patristics and ecclesiastical history.
With a scholarship from the Austrian Academy of Sciences, he completed his habilitation in patrology, dogma history and ecumenical theology at the University of Graz in 2000 with a thesis on East Syriac Christianity.
At Boston University (MA, USA), Winkler was Professor and associate director of the Division of Religious and Theological Studies from 2003 to 2005.
In 2012, he conducted research as visiting scholar at the Center for the Study of World Religions at Harvard University (Cambridge, MA, USA) and in 2018 at the "Centre Paul-Albert-Février - Textes et Documents de la Méditerranée antique et médiévale" at the Université Aix-Marseille.
His work focuses on the cultural history and present of the Eastern Churches, Oriental Christian literature and historical theology in their political contexts.