Mary Hayden

Mary Hayden
Born1862 (1862)
Dublin, Ireland
Died1942 (aged 79–80)
Dublin, Ireland
Alma materAlexandra College
Royal University of Ireland
OccupationsHistorian, Suffragist
FatherThomas Hayden
RelativesThomas Crean (cousin)

Mary Teresa Hayden (1862 – 12 July 1942) was an Irish historian, Irish-language activist and campaigner for women's causes.