|Birth:||11 March 1886|
North Adams, Massachusetts, USA
|Death:||27 December 1996|
Williamstown, Massachusetts, USA
|Age:||110 years, 291 days|
Mary Ambrose O'Hern (11 March 1886 – 27 December 1996) was an American supercentenarian. She was born in North Adams, Berkshire, Massachusetts on 11 March 1886 as the daughter of Richard and Agnes McNamara O'Hern. She worked as a teacher for 50 years and retired as principal of the Freeman school in 1956. She never married.
Mary O'Hern died in Williamstown, Massachusetts on 27 December 1996, aged 110 years, 291 days.