Mary Kelly

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