Matthew James Emerton (born 1971) is an Australian mathematician who is a professor of mathematics at the University of Chicago.
His research interests include number theory, especially the theory of automorphic forms.
He ranks among the top 0.25% overall of users on MathOverflow, where he has been known for his expository pieces on the Langlands program, his posts on algebraic geometry, and his posts on number theory.
He has also been known for helpful posts on cohomology theories.