Geraldine Mills is the author of six collections of poetry, four collections of short stories and two children's novels for middle-grade readers. She has been awarded many prizes and bursaries including the Hennessy/Tribune Emerging Fiction Award and New Irish Writer Award, for her short story, Lick of the Lizard, three Arts Council Bursaries, a Covid Crisis Award and a Patrick and Katherine Kavanagh Fellowship for her poetry collection, An Urgency of Stars (Arlen House, 2010).

Her children's novel Gold (Little Island, 2016) tells the story of twin boys, Starn and Esper, born after their world has been destroyed by massive volcanic explosions, who set off across forbidden islands in search of treasure using a hand-built glider. Its sequel, Orchard (Andrena Press, 2021), follows the twins as they journey home with their treasure to save Orchard Territory.

She has been awarded writing residencies in The Tyrone Guthrie Centre, Annaghmakerrig, Cill Rialaig Arts Centre, The Heinrich Böll Cottage, Achill Island, Ireland and Fundación Valparaíso, in Spain, and travels regularly to the US to give readings. She lives in Co. Galway on the west coast of Ireland.