Michael Alan Messner (born 1952) is an American sociologist. His main areas of research are gender (especially men's studies) and the sociology of sports. He is the author of several books, he gives public speeches and teaches on issues of gender-based violence, the lives of men and boys, and gender and sports. Since 1987, Messner has worked as a professor of sociology and gender studies at the University of Southern California. He was head of the department, and still retains his dual faculty appointment. He was the president of the Pacific Sociological Association in 2010-2011, and in 2011 the California Women's Law Center presented him with the Pursuit of Justice Award.