Mary Catherine
Mary Catherine, Mary Katharine, or Mary Katherine may refer to:
Mary Catherine
- Mary Catherine Bateson, American writer and cultural anthropologist
- Mary Catherine Bolton, English actress
- Mary Catherine Bruton, Australian Roman Catholic nun, educator, and hospital administrator
- Mary Catherine Cuff, American former Supreme Court justice
- Mary-Catherine Deibel, American restaurant owner
- Mary Catherine Ferguson, Irish author and biographer
- Mary Catherine Garrison, American actress
- Mary Catherine Judd, American educator, author of children's literature, and peace activist
- Mary Catherine Lamb, American textile artist
- Mary Catherine Loreto, one of the Cassandra Martyrs of Charity
- Mary Catherine Nivert, birth name of Taffy Nivert, American songwriter and singer
- Mary Catherine Phee, American diplomat
- Mary Catherine Rowsell, English novelist, author of children's fiction, and dramatist
Mary Katharine
- Mary Katharine Brandegee, American botanist
- Mary Katharine Goddard, American postmaster, publisher, and book seller
- Mary Katharine Ham, American journalist
Mary Katherine
- Mary Katherine Fechtel, American beauty pageant titleholder
- Mary Katherine Horony Cummings, real name of Big Nose Kate, Hungarian-born American outlaw, gambler, prostitute, and common-law wife of Doc Holliday
- Mary Katherine Linaker, birth name of Kay Linaker, American actress and screenwriter
- Mary Katherine Loyacano McCravey, American landscape- and still life painter
Fictional characters
- Mary Katherine Blackwood, in Shirley Jackson's 1962 novel, We Have Always Lived in the Castle
- Mary Katherine Gallagher, in the US TV show Saturday Night Live, played by Molly Shannon