Ahmet Nihat Berker is a Turkish theoretical physicist and emeritus professor of physics at MIT. His main research interest is statistical mechanics and renormalization group theory. After his retirement from MIT, he returned to Turkey and served as a professor and Dean of the School of Sciences and Letters at Istanbul Technical University. He is currently a faculty member of physics department at Koc University, Istanbul.

He is also the son of a notable scientist and an engineer Ratip Berker, who deceased on 17.10.1997.