Mary Mackay may refer to:
- Mary Mackay (1855–1924), English novelist, known by her pseudonym Marie Corelli
- Mary Mackay (actor) (fl. 1940s–1980s), Irish-Australian actress
See also
edit- Mary Mackey (born 1945), American novelist, poet, and academic
- Mary Helen Johnston (later Mary Helen McCay, born 1945), American scientist and astronaut
This disambiguation page lists articles about people with the same name.
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