Barry Austin Gusterson (born 24 October 1946) is a British pathologist who has been Professor of Pathology at the University of Glasgow since 2000 and Head of Forensic Medicine and Forensic Science, since 2006. Prior to this he was Founding Director of the Toby Robins Breakthrough Breast Cancer Research Centre at the Institute of Cancer Research and Professor of Pathology and Head of the Section of Molecular Pathology at the Institute of Cancer Research.