Mary Kelly
Mary Kelly may refer to:
- Mary Jane Kelly, widely believed to be the fifth and final victim of Jack the Ripper
- Mary Kelly (writer), Scottish writer
- Mary Kelly (artist), American artist and writer
- Mary Kelly (gymnast), British Olympic gymnast
- Mary Kelly, Australian handball player
- Mary Kelly (journalist),, American journalist
- Mary Kelly (politician), Irish Labour Party politician, Member of the 20th Seanad
- Mary Beth Kelly, justice on the Michigan Supreme Court
- Mary Eva Kelly, Irish poet and writer
- Mary Louise Kelly, National Public Radio's senior Pentagon correspondent
- Mary Kelly (playwright), British playwright, pageant maker and founder of the Village Drama Society
- Mary Jane Kelly (band), an Australian hardcore band