Claude Mason Steele (born January 1, 1946) is a social psychologist and emeritus professor at Stanford University, where he is the I. James Quillen Endowed Dean, Emeritus at the Stanford Graduate School of Education, and Lucie Stern Professor in the Social Sciences, Emeritus. Formerly he was the executive vice chancellor and provost at the University of California, Berkeley. He also served as the 21st provost of Columbia University for two years. Before that, he had been a professor of psychology at various institutions for almost 40 years.