Mary Elizabeth Pipher, also known as Mary Bray Pipher (born October 21, 1947), Ph.D., is an American clinical psychologist and author. She received a Bachelor of Arts degree in anthropology from the University of California, Berkeley in 1969 and a Ph.D. in clinical psychology from the University of Nebraska–Lincoln in 1977. She was a Rockefeller Scholar In Residence at Bellagio in 2001. She received two American Psychological Association Presidential Citations. She returned the one she received in 2006 as a protest against the APA's acknowledgment that some of its members participate in controversial interrogation techniques at Guantánamo Bay and at US "black sites".
She resides in Lincoln, Nebraska.