Hendrik Pieter (Henk) Barendregt (b. 1947) is a Dutch logician, known for his work in lambda calculus and type theory.
Barendregt holds the chair of Foundations of Mathematics and Computer Science at Radboud University Nijmegen, The Netherlands, and is adjunct professor at Carnegie Mellon University, Pittsburgh Pennsylvania, USA. Since 1986 he has been a professor at Radboud University Nijmegen, where he and his group work on Constructive Interactive Mathematics.
At Utrecht University he studied mathematical logic, obtaining his Masters in 1968 and his Ph.D. in 1971, both cum laude, under Dirk van Dalen and Georg Kreisel. After a postdoctoral period at Stanford University he held positions at Utrecht University and was a visiting scholar at Darmstadt, ETH Zürich, Siena and Kyoto.
In 2002 he was knighted in the Orde van de Nederlandse Leeuw. Barendregt obtained on February 6, 2003 the NWO Spinoza Award