Mary Kelly may refer to:
- Mary Jane Kelly (1863–1888), widely believed to be the fifth and final victim of Jack the Ripper
- Mary Kelly (writer) (born 1927), Scottish writer
- Mary Kelly (artist) (born 1941), American artist and writer
- Mary Kelly (handballer) (born 1985), Australian handball player
- Mary Kelly (politician) (born 1952), Irish Labour Party politician, Member of the 20th Seanad
- Mary Beth Kelly, justice on the Michigan Supreme Court
- Mary Eva Kelly (1826–1910), Irish poet and writer
- Mary Louise Kelly, National Public Radio's senior Pentagon correspondent
- Mary Kelly (camogie)
Famous quotes containing the word mary:
“Never be intimidated when you deal with men. Curse, don’t cry.”
—Anonymous, U.S. professional woman. As quoted in Aspirations and Mentoring in an Academic Environment, ch. 4, by Mary Niles Maack and Joanne Passet (1994)