Mary Catherine

Mary Catherine, Mary Katharine, or Mary Katherine may refer to:

Mary Catherine

 * Mary Catherine Bateson (1939–2021), American writer and cultural anthropologist
 * Mary Catherine Bolton (1790/1791–1830), English actress
 * Mary Catherine Bruton (1862–1937), Australian Roman Catholic nun, educator, and hospital administrator
 * Mary Catherine Cuff (born 1947), American former Supreme Court justice
 * Mary-Catherine Deibel (?–2023), American restaurant owner
 * Mary Catherine Ferguson (1823–1905), Irish author and biographer
 * Mary Catherine Garrison (born 1973), American actress
 * Mary Catherine Judd (1852–1937), American educator, author of children's literature, and peace activist
 * Mary Catherine Lamb (1949–2009), American textile artist
 * Mary Catherine Loreto (?–1983), one of the Cassandra Martyrs of Charity
 * Mary Catherine Nivert, birth name of Taffy Nivert (born 1944), American songwriter and singer
 * Mary Catherine Phee (born 1963), American diplomat
 * Mary Catherine Rowsell (1839–1921), English novelist, author of children's fiction, and dramatist

Mary Katharine

 * Mary Katharine Brandegee (1844–1920), American botanist
 * Mary Katharine Goddard (1738–1816), American postmaster, publisher, and book seller
 * Mary Katharine Ham (born 1980), American journalist

Mary Katherine

 * Mary Katherine Fechtel, American beauty pageant titleholder
 * Mary Katherine Horony Cummings, real name of Big Nose Kate (1849–1940), Hungarian-born American outlaw, gambler, prostitute, and common-law wife of Doc Holliday
 * Mary Katherine Linaker, birth name of Kay Linaker (1913–2008), American actress and screenwriter
 * Mary Katherine Loyacano McCravey (1910–2009), 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