Marek Hłasko was a Polish author and screenwriter.

Marek Krajewski is a Polish crime writer and linguist.

Marek Żukow-Karczewski is a Polish historian, journalist, and author who specializes in the history of Poland, especially Kraków, and in the history of architecture and environmental issues. He is a descendant of the Polish noble family Karczewski and of the Russian noble family Żukow.

Marele Day is an Australian author of mystery novels. She won the Shamus Award for her first Claudia Valentine novel and a Ned Kelly Award for non-fiction work How to Write Crime.

Maretha Maartens, is a South African author, freelance journalist and editor who writes children's and religious books that deal with the discrimination of blacks, especially of women and children. In 1993, she received an award for children's books of the Catholic Church of Austria.

Marfa Semyonovna Kryukova was a Russian folklore performer and a storyteller.

Margaret Ann Courtney was an English poet and folklorist based in Penzance, Cornwall.

Margaret Scotford Archer was an English sociologist, who spent most of her academic career at the University of Warwick where she was for many years Professor of Sociology. She was also a professor at l'Ecole Polytechnique Fédérale de Lausanne, Switzerland. She is best known for coining the term elisionism in her 1995 book Realist Social Theory: The Morphogenetic Approach. On 14 April 2014, Archer was named by Pope Francis to succeed former Harvard law professor and US Ambassador to the Holy See Mary Ann Glendon as President of the Pontifical Academy of Social Sciences, and served in this position until her retirement on 27 March 2019.

Margaret Armour was a Scottish poet, novelist, and translator. She translated the Nibelungenlied from Middle High German into English prose, first published in 1897 as The Fall of the Nibelungs. In 1910 she translated The Ring of the Nibelung by Richard Wagner, and in 1928 she translated Gudrun.

Margaret Eliza Ashmun was an American writer from Rural, Wisconsin. She trained as a teacher and taught for a few years then concentrated on her writing. She edited collections of short stories and writing textbooks, and wrote dozens of poems, essays, and stories that were published in the popular magazines and newspapers of her day. She was the author of more than 18 novels for both adults and young readers, especially girls.