Sinéad Gleeson is an Irish writer, editor and broadcaster. Born and raised in Dublin, she studied English and History at University College Dublin, and was the Arts Council Writing Fellow in residence there in 2019. She has presented The Book Show on RTÉ Radio 1, and has collaborated with artists and musicians on installations and commissions for the Wellcome Collection, the BBC, Frieze and City Gallery Wellington.

Her essay collection Constellations: Reflections from Life (2019) won Non-Fiction Book of the Year at the Irish Book Awards and the Dalkey Literary Award for Emerging Writer, and was shortlisted for the Rathbones Folio Prize and the James Tait Black Memorial Prize. As an editor she assembled The Long Gaze Back: An Anthology of Irish Women Writers, The Glass Shore: Short Stories by Women Writers from the North of Ireland and The Art of the Glimpse: 100 Irish Short Stories, and co-edited This Woman's Work: Essays on Music with Kim Gordon.

Her debut novel, Hagstone (4th Estate, 2024), is set on a wild island where the artist Nell makes work rooted in landscape, folklore and the feminine. The Inìons, a commune of women drawn there from all over the world, commission her for a piece celebrating their history - and the islanders all live alongside strange murmurings from deep within the island, a sound the Inìons call a Summoning. Hagstone was shortlisted for the John McGahern Book Prize and longlisted for the 2025 International Dublin Literary Award.