Mary Steinhauser (August 25, 1942 – June 11, 1975) was a Canadian social worker and prison classification officer who was killed during a hostage-taking at the B.C.
Penitentiary in 1975.
On June 9, 1975, Steinhauser was one of 15 people that were taken hostage by three inmates, Andy Bruce, Dwight Lucas and Claire Wilson, who were attempting a prison breakout.
Prior to the hostage-taking and her death, Steinhauser was an outspoken advocate against solitary confinement.A bursary was opened in Steinhauser's name and benefits Simon Fraser University Aboriginal Undergraduate Students in Arts & Social Sciences.