Udo Thiel (born 19 September 1954) is a German Philosopher and Professor i. R. at the Department of Philosophy at the University of Graz, Austria.
In 1982 he completed his doctorate under the supervision of Hans Wagner at the University of Bonn.
His research focuses on seventeenth- and eighteenth-century epistemology, metaphysics and philosophy of mind.
In 2013 Udo Thiel was elected a Corresponding Member of the Austrian Academy of Sciences (ÖAW).
In 2014 he received the Styrian government Award (Forschungspreis) for his research in early modern philosophy.