Before Mars is a 2018 science fiction novel by British writer Emma Newman. It was first published in the United States as a paperback original in April 2018 by Ace Books, and in the United Kingdom by Gollancz. An audio edition of the book was published in April 2018 in the United States by Tantor Audio, and in the United Kingdom by Orion Publishing.

Emma Newman is a British science fiction and fantasy writer, podcaster and audiobook narrator. Her award nominations include the British Fantasy Award for Between Two Thorns in 2014 and the Arthur C. Clarke Award for After Atlas in 2017. Her Planetfall series was nominated for the 2020 Hugo Award for Best Series.