Mary Clark
Mary Clark may refer to:
- Mary Bateman Clark, American woman, born into slavery, who won her freedom
- Mary Clark , Canadian architect
- Mary Clark-Glass, academic, medical administrator and former politician in Northern Ireland
- Mary Clark , London printer and publisher
- Mary Clark Thompson, philanthropist and wife of banker Frederick Ferris Thompson
- Mary E. Clark, American biologist
- Mary Elizabeth Clark, main mover of the AIDS Education and Global Information System
- Mary Ellen Clark, American diver
- Mary Higgins Clark, American author
- Mary Jane Clark, American author
- Mary Kitson Clark, British archaeologist
- Mary Margaret Clark, American medical anthropologist
- Mary Mead Clark, American wife of missionary Edward Winter Clark
- Mary T. Clark, American historian of philosophy