Mary Martha Sherwood was a nineteenth-century English children's writer. Of her more than four hundred works, the best known include The History of Little Henry and his Bearer (1814) and the two series The History of Henry Milner (1822–1837) and The History of the Fairchild Family (1818–1847). Her evangelicalism permeated her early writings, but later works cover common Victorian themes such as domesticity.

Mary Mills Patrick was a college president and author.

Mary Mann Page Newton Stanard was an American historian, specializing in the history of Virginia.

Mary Noailles Murfree was an American author of novels and short stories who wrote under the pen name Charles Egbert Craddock. She is considered by many to be Appalachia's first significant female writer and her work a necessity for the study of Appalachian literature, although a number of characters in her work reinforce negative stereotypes about the region. She has been favorably compared to Bret Harte and Sarah Orne Jewett, creating post-Civil War American local-color literature.

Mary Platt Parmele was an American historian and writer.

Mary Raymond Shipman Andrews was an American writer. She is best known for a widely read short story about US President Abraham Lincoln, "The Perfect Tribute", which was adapted for film twice and sold 600,000 copies when published as a standalone volume.

Mary Ritter Beard was an American historian, author, women's suffrage activist, and women's history archivist who was also a lifelong advocate of social justice. As a Progressive Era reformer, Beard was active in both the labor and women's rights movements. She also authored several books on women's role in history including On Understanding Women (1931), America Through Women's Eyes, and Woman as Force in History: A Study in Traditions and Realities (1946), her major work. In addition, she collaborated with her husband, historian Charles Austin Beard, as coauthor of seven textbooks, most notably The Rise of American Civilization (1927), two volumes, and America in Midpassage: A Study of the Idea of Civilization (1939) and The American Spirit (1942), the third and fourth volume of The Rise of American Civilization series. A standalone book, Basic History of the United States, was their best-selling work.

Mary Roberts Rinehart was an American writer, often called the American Agatha Christie. Rinehart published her first mystery novel The Circular Staircase in 1908, which introduced the "had I but known" narrative style. Rinehart is also considered the source of "the butler did it" plot device in her novel The Door (1930), although the exact phrase does not appear in her work. She also worked to tell the stories and experiences of front line soldiers during World War I, one of the first women to travel to the Belgian front lines.

Mary Russell Mitford was an English author and dramatist. She was born at Alresford in Hampshire. She is best known for Our Village, a series of sketches of village scenes and vividly drawn characters based upon her life in Three Mile Cross near Reading in Berkshire.

Mary Wollstonecraft Shelley was an English novelist who wrote the Gothic novel Frankenstein; or, The Modern Prometheus (1818), which is considered an early example of science fiction. She also edited and promoted the works of her husband, the Romantic poet and philosopher Percy Bysshe Shelley. Her father was the political philosopher William Godwin and her mother was the philosopher and women's rights advocate Mary Wollstonecraft.