Karl Hess (born June 20, 1945 in Trumau, Austria) is the Swanlund Professor Emeritus in the Department of Electrical and Computer Engineering at the University of Illinois at Urbana–Champaign (UIUC).
He helped to establish the Beckman Institute for Advanced Science and Technology at UIUC.Hess is concerned with solid-state physics and the fundamentals of quantum mechanics.
He is recognized as an expert in electron transport, semiconductor physics, supercomputing, and nanostructures.
A leader in simulating the nature and movement of electrons with computer models,
Hess is considered a founder of computational electronics.Hess has been elected to many scientific associations, including both the National Academy of Engineering (2001) and the National Academy of Sciences (2003).
He has served on the National Science Board (NSB).