Ileen Donnor was an 86-year-old resident of Eugene, Oregon, who died on February 17, 1979. Her death was later linked to a series of alleged mercy killings by Otha Harrison Hart, a former nursing home employee, who confessed in October 1979 in Lincoln, Nebraska to giving lethal injections of insulin to four patients, including Donnor.

Hart was initially charged with aggravated murder in connection with these deaths but, after a plea bargain, his charges were reduced to attempted murder and he was extradited to Eugene. Donnor was buried at West Lawn Memorial Park in Eugene, Lane County, Oregon.