Mary Harrod Northend was an American writer specializing in American colonial architecture and home furnishings. She is best known for the thousands of photographs she either took or commissioned to illustrate her books and articles.

Mary Hartwell Catherwood was an American writer of popular historical romances, short stories, and poetry. Early in her career she published under her birth name, Mary Hartwell, and under the pseudonym Lewtrah. She was known for setting her works in the Midwest, for a strong interest in American dialects, and for bringing a high standard of historical accuracy to the period detail of her novels.

Mary Hastings Bradley was a traveler and author. She was the mother of the author Alice Sheldon.

Mary Hays (1759–1843) was an autodidact intellectual who published essays, poetry, novels and several works on famous women. She is remembered for her early feminism, and her close relations to dissenting and radical thinkers of her time including Robert Robinson, Mary Wollstonecraft, William Godwin and William Frend. She was born in 1759, into a family of Protestant dissenters who rejected the practices of the Church of England. Hays was described by those who disliked her as 'the baldest disciple of [Mary] Wollstonecraft' by The Anti Jacobin Magazine, attacked as an 'unsex'd female' by clergyman Robert Polwhele, and provoked controversy through her long life with her rebellious writings. When Hays's fiancé John Eccles died on the eve of their marriage, Hays expected to die of grief herself. But this apparent tragedy meant that she escaped an ordinary future as wife and mother, remaining unmarried. She seized the chance to make a career for herself in the larger world as a writer.

Mary S. Hooper is an American politician and civic leader from the state of Vermont. She was a member of the Vermont House of Representatives from 2009 to 2023, representing the Washington-5 Representative District.

Mary Howitt was an English poet, the author of the famous poem The Spider and the Fly. She translated several tales by Hans Christian Andersen. Some of her works were written in conjunction with her husband, William Howitt. Many, in verse and prose, were intended for young people.

Mary Jane Holmes was an American author who published 39 novels, as well as short stories. Her first novel sold 250,000 copies; and she had total sales of 2 million books in her lifetime, second only to Harriet Beecher Stowe. Her books included: "Tempest and Sunshine" (1854), "English Orphans" (1855), "Homestead on the Hillside" (1855), "Lena Rivers" (1856), "Meadow Brook" (1857), "Dora Deane" (1858), "Cousin Maude" (1860), "Marian Gray" 186^, "Hugh Worthington" (1864), "Cameron Vide" (1867). "Rose Mather" (1868), "Ethelyn’s Mistake" (1869), "Edna Browning" (1872), "Mildred" (1877), "Forest House" (1879), "Daisy Thornton," "Queenie Hetherton" (1883), "Christmas Stories" (1884), "Bessie's Fortune" (1885). "Gretchen" (1887), "Marguerite" (1891).

Mary Johnston was an American novelist and women's rights advocate from Virginia. She was one of America's best selling authors during her writing career and had three silent films adapted from her novels. Johnston was also an active member of the Equal Suffrage League of Virginia, using her writing skills and notability to draw attention to the cause of women's suffrage in Virginia.

Mary Traill Spence Lowell Putnam was an American author. She was the sister of James Russell Lowell, and the daughter of Rev. Charles Lowell. She had an aptitude for acquiring languages: she was eventually fluent in French, Italian, German, Polish, Swedish and Hungarian, and familiar with many other languages. She married Samuel R. Putnam in 1832 and later traveled abroad for several years.

Mary Elizabeth Mapes Dodge was an American children's author and editor, best known for her novel Hans Brinker. She was the recognized leader in juvenile literature for almost a third of the nineteenth century.