Mary Davies may refer to:
Arts and entertainment Mary Davies (mezzo-soprano) (1855–1930), Welsh singer Mary Davies (poet) (1846–1882), Welsh poet Mary Bridget Davies (born 1978), American singer and actress Mary Ignatius Davies (1921–2003), Sister of Mercy and music teacher
Literature Mary Carolyn Davies (1888–?), American writer Mary Davies (writer) from 16th Lambda Literary Awards
Sports Mary Davies (athlete), represented New Zealand at the 2009 World Championships in Athletics Mary Davies (bowls), Welsh lawn bowler Mary Elizabeth Davies, Welsh chess player
Others Mary Davies Wilburn (1883–1987), longest-lived survivor of the sinking of the RMS Titanic Mary Davies (heiress), wife of Sir Thomas Grosvenor, 3rd Baronet
See also Mary Davys (1670s–1732), Irish novelist and playwright Mary Davis (disambiguation)