Howard Alan Masur is an American mathematician who works on topology, geometry, and combinatorial group theory.

[1][2] Masur was an invited speaker at the 1994 International Congress of Mathematicians in Zürich.

[4] Along with Yair Minsky, Masur is one of the pioneers of the study of curve complex geometry.

[5] He also contributed to the understanding of the convergence of geodesic rays in Teichmüller theory.

[6] Masur was a Ph.D. student of Albert Marden at the University of Minnesota-Minneapolis.