David P. Barash (born 1946) is Professor of Psychology emeritus at the University of Washington. He has written, edited or co-authored 40 books, including ones on human aggression, peace studies, and the sexual behavior of animals and people. He received his bachelor's degree in biology from Harpur College, Binghamton University, and a Ph.D. in zoology from University of Wisconsin–Madison in 1970. He taught at the State University of New York at Oneonta and then accepted a permanent position at the University of Washington.