Jan Sładkowski (born 1958 in Świętochłowice) is a Polish physicist.
He is notable for his work on the role of exotic smoothness in cosmology, quantum game theory, and applications of thermodynamics in the theory of finance.
He earned his PhD, under Marek Zrałek, and habilitation in theoretical physics from the University of Silesia, Katowice, Poland.
He has published a number of papers on quantum field theory, mathematical physics, quantum information processing, and econophysics.
He presently holds the Chair of Astrophysics and Cosmology at the University of Silesia.