Mary Bennett may refer to:
- Mary Bennett (academic) (1913âÂÂ2005), British academic, principal of St Hilda's College, Oxford
- Mary Bennett (lighthouse keeper) (1816âÂÂ1885), lighthouse keeper in New Zealand
- Mary Bennett Peterson (?âÂÂ2011), American author and lobbyist
- Mary Bennett Ritter (1860âÂÂ1949), American physician, and advocate for women's rights and public health issues
- Mary L. Bennett (born 1942), American artist
- Mary Montgomerie Bennett (1881âÂÂ1961), Australian activist
- Mary Wicks Bennett (1819âÂÂ1898), American Shaker apostate and magazine editor