Mary Davidson may refer to:Mary Davidson (1902–1986), member of Seanad Éireann Mary Davidson (artist) (1865–1951), Scottish artist Mary Davidson (editor) (1872–1941), American newspaper editor and member of the Illinois House of Representatives Mary Ann Davidson, chief security officer of Oracle Corporation Mary Ann Maitland (1839–1919), née Davidson, Scottish-born Canadian author Mary Wallace Davidson (1935–2012), American music librarian