Hermann Nitsch (born 29 August 1938) is an Austrian avant-garde artist who works in experimental and multimedia modes. Born in Vienna, Nitsch received training in painting when studied at the Wiener Graphische Lehr-und Versuchanstalt, during which time he was drawn to religious art. He is associated with the Vienna Actionists.

He lives and works at Prinzendorf Castle on the Zaya River, Lower Austria, as well as in Asolo, Italy. His works are exhibited in the two Nitsch Museums in Mistelbach and Naples as well as in the Nitsch Foundation in Vienna and in prestigious international museums and galleries