A Sydney-based author, Margo Lanagan grew up in the Hunter Valley, New South Wales, and in Melbourne, Victoria. She holds a degree in history from the University of Sydney and has worked in a variety of occupations including selling encyclopaedias, writing corporate reports and working in a roadhouse on the Nullarbor Plain. Lanagan has also travelled widely and during the late 1980s lived in Paris while on a writing grant.
Since her return to Australia in 1988 Lanagan has worked as a writer and freelance book editor. She has an established popular appeal and a number of her works have been translated into different languages. Lanagan writes speculative fiction and fiction for children and young adults. Her multi-award winning work is said to combine 'a sure sense of plot, with a deep understanding of children's concerns and feelings'.
Lanagan has presented talks and conducted writing workshops in schools. She attended Clarion West, a six-week residential writing workshop for science-fiction and fantasy writers, in Seattle, USA, in 1999 and has tutored at the Queensland-based Clarion South (q.v.).
Her short story 'Singing My Sister Down' has been included in 'best of' anthologies in both Australia and the United States: she is the author of multiple novels, including the Zeroes series with Deborah Biancotti and Scott Westerfeld, and numerous collections of short stories, including the World Fantasy Award-winning Black Juice.
In 2023, her forthcoming young-adult fantasy, Spindle Sisters, was announced for Knopf Children's.
She has been nominated for the Astrid Lindgren Award five times, and won major awards including World Fantasy Awards, Aurealis Awards, the Barbara Jefferis Award, and CBCA Awards, as well as shortlistings including the Norma K. Hemming Award and the Shirley Jackson Award.