Joan Hess was an American mystery writer, a member of Sisters in Crime, and a former president of the American Crime Writers League. She wrote two popular mystery series: The Claire Malloy Mysteries and The Maggody Mysteries, and contributed to multiple anthologies and book series, including: Crosswinds, Deadly Allies, Malice Domestic, Sisters in Crime, and The Year's 25 Finest Crime and Mystery Stories. She also wrote the Theo Bloomer mystery series, under the pseudonym Joan Hadley.

Joan Hohl was an American writer of over 60 romance novels starting in 1980. She signed her novels as Paula Roberts and Amii Lorin. She was a recipient of the RITA Award.

Joan Holub is an author and illustrator of over 180 books for children. She also uses the pen names Rita Book and Brad Bucks.

Joan Johnston is a best-selling American author of over forty contemporary and historical romance novels.

Joan à Beckett Weigall, Lady Lindsay was an Australian novelist, playwright, essayist, and visual artist. Trained in her youth as a painter, she published her first literary work in 1936 at age forty under a pseudonym, a satirical novel titled Through Darkest Pondelayo. Her second novel, Time Without Clocks, was published nearly thirty years later, and was a semi-autobiographical account of the early years of her marriage to artist Sir Daryl Lindsay.

Joan Lingard MBE was a Scottish writer. Lingard was born in Edinburgh, Scotland, but spent many years living in Belfast, Northern Ireland.

Joan Lowery Nixon was an American journalist and author, specializing in historical fiction and mysteries for children and young adults.

Joan Manuel Gisbert is a Spanish writer of children's literature. His books have been translated into ten languages.

Joan Manuel Serrat Teresa is a Spanish musician, singer and composer. He is considered one of the most important figures of modern, popular music in both the Spanish and Catalan languages.

Joan Maragall i Gorina was a Spanish poet, journalist and translator, the foremost member of the modernisme movement in literature. His manuscripts are preserved in the Joan Maragall Archive of Barcelona.