Mary Griffith
Mary Griffith may refer to:
- Mary Griffith (writer) (1772–1846), American writer, horticulturist and scientist
- Mary Griffith (activist) (1934–2020), American LGBT rights activist
- Mary Harriett Griffith (1849–1930), philanthropist in Brisbane, Queensland, Australia
- Mary Lavinia Griffith (1906–1993), American rancher and conservationist