Kylemore Abbey (Irish: Mainistir na Coille Móire) is a Benedictine nunnery founded in 1920 on the grounds of Kylemore Castle, in Connemara, County Galway, Republic of Ireland. The abbey was founded when Benedictine Nuns fled Belgium in World War I.
Originally called Kylemore Castle, it was built between 1863 and 1868 as a private home for the family of Mitchell Henry, a wealthy politician from Manchester, England who was also MP for Galway County from 1871 to 1885. After the death of his wife Margaret in 1875, Mitchell did not spend much time there. He and his wife are both buried in the small mausoleum near the church in the grounds of the abbey. Notable features of the abbey are the neo-Gothic church (built between 1877 and 1881), a miniature replica of Norwich Cathedral, made from local green Connemara marble, and the Victorian walled garden.
The abbey houses a secondary girls' boarding school, Kylemore Abbey International Girls' School. The house and gardens are open to the public.
The name Kylemore originates from the Irish words Coill Mór – meaning Great Wood.