Mary Elizabeth (Barnicle) Cadle (April 17, 1891 - November 26, 1978) was an American folklorist, Medieval English literature professor, and activist interested in women's and African-American rights, suffrage, and the labor movement. She collected and made numerous field recordings of folk songs and stories throughout the South and Caribbean from the mid 1930s until the early 1950s. She collected with Alan Lomax and later her husband, Tillman Cadle.