Maria Magdalene Tatar (born May 13, 1945) is an American academic whose expertise lies in children's literature, German literature, and folklore. She is the John L. Loeb Professor of Germanic Languages and Literatures, and Chair of the Committee on Degrees in Folklore and Mythology at Harvard University.

Maria Tatar was born in Pressath, Germany. Her family emigrated from Hungary to the United States in the 1950s when she was a child.
She grew up in Highland Park, Illinois and graduated from Highland Park High School in 1963.
Tatar earned a bachelor's degree from Denison University and a doctorate from Princeton University. In 1971, after finishing her doctorate at Princeton University, Tatar joined the faculty of Harvard University, where she received tenure in 1978. She lives in Cambridge, Massachusetts.