Mary O'Connor may refer to:
Arts and media Mary O'Connor, a poor servant, subject of the 19th century Irish ballad "The Rose of Tralee" Mary O'Connor (died 2013), Hugh Hefner's secretary, frequent guest on The Girls Next Door Mary-Anne O'Connor, Australian novelist "There's Something About Mary O'Connor", episode of The Girls Next Door Mary Flannery O'Connor (1925–1964), American writer Mary H. O'Connor (1872–1959), American screenwriter and film editor Mary Murillo (1888–1944), born Mary O'Connor, English-born U.S. actress turned screenwriter
Politics Mary O'Connor (Illinois politician) (born 1959), Chicago alderman Mary Mitchell O'Connor (born 1959), Irish politician
Sportswomen Mary O'Connor (runner) (born 1955), retired long-distance runner from New Zealand Mary O'Connor (Irish sportsperson) (born 1977), camogie and Gaelic football player and official Mary Anne O'Connor (born 1953), American Olympic basketball player Mary I. O'Connor (born c. 1959), U.S. Olympic team rower and orthopedic surgeon
Other people Mary Agnes O'Connor (1815–1859), Irish Sisters of Mercy nun and social worker Mary O'Connor, a relevant party to the court case Matter of O'Connor, 1988
Fictional characters Mary O'Connor, in the 1920 US drama film The Prince of Avenue A, played by Cora Drew Mary O'Connor, in the UK soap opera London Bridge, played by Simone Lahbib Mary Anastasia O'Connor, the character Maisie Ravier's alter ego in the Maisie series of films
See also Mary Connor (disambiguation)