Heinrich Hencky (2 November 1885 – 6 July 1951) was a German engineer.
Born in Ansbach, he studied civil engineering in Munich and received his PhD from the Technische Hochschule Darmstadt.
After the war he taught at Darmstadt, Dresden and at Delft in the Netherlands.
At Delft University of Technology he worked on slip-line theory, plasticity and rheology, for which he is best known.
In 1930 he went to Massachusetts Institute of Technology and in 1931 gave one of the first lectures on rheology.