Mary Cunningham may refer to:
- Mary Ann Cunningham (1841–1930), Canadian temperance activist
- Mary Cunningham, American competitor in Diving at the 1951 Pan American Games
- Mary Cunningham Agee (born 1951), American business executive and author
- Mary Cunningham Boyce, American engineering professor
- Mary Elizabeth Cunningham (1868–1939), Irish philanthropist and war worker