Mary Allen

Mary Allen or Allan may also refer to:


 * Mary Electa Allen (1858–1941), American photographer
 * Mary Allan (British academic) (1869–1956), British academic, principal of Homerton College, Cambridge
 * Mary Hayes Allen (1875–1935), American educator
 * Mary Sophia Allen (1878–1964), Welsh-born suffragette who was an early police woman and a far right leader
 * Aileen Allen (Mary Aileen Allen, 1888–1950), American diver who competed in the 1920 Summer Olympics
 * Mary Cecil Allen (1893–1962), Australian artist, writer and lecturer
 * Mary Parsons Reid Allan (1917–2002), Scottish artist
 * Mary Belle Allen (1922–1973), American botanist and chemist
 * Mary Love (Mary Ann Allen, 1943–2013), American singer
 * Mary Allen (arts administrator) (born 1951), British writer, broadcaster, arts administrator and management consultant
 * Elyse Allan (Mary Elyse Allan, born 1956/7), Canadian businesswoman
 * Mary Cecelia Allen, American writer and writing coach