Nicholaus Contreraz (January 15, 1982 – March 2, 1998) was an American 16-year-old from Sacramento, California, who was murdered while attending the Arizona Boys Ranch in 1998. Contreraz had been incarcerated at the residential school's branch in Oracle, Arizona, where he was subject to severe physical abuse and willful neglect at the hands of staff members until dying from cardiac arrest.