Delphi ( or ; , ) is a locality in County Mayo, Ireland. Its English name was coined by the Marquis of Sligo, who built a hunting lodge there.Fahy, Jim. The lonesome west, The Irish Times, 1 September 2010. Retrieved 1 August 2025.
The valley includes the Owengar River that connects Fin Lough to Doo Lough, between the fjord of Killary Harbour to the south and the Sheeffry Hills to the north, and the Bundorragha River and valley that is surrounded by the Mweelrea Mountains and the neighbouring peaks of Ben Creggan and Ben Gorm. The R335 road passes through it.
History Delphi Lodge played a central role in the Doolough Tragedy. British monarch Edward VII visited in 1903, and Charles III visited in 1995.Lodge History, DelphiLodge.ie. Retrieved 1 August 2025. County Mayo Gaelic Athletic Association senior footballer Frank Noone built the first adventure centre in Ireland in Delphi.Fahy, Jim. Adventure Awaits In Mayo, RTE Nationwide, 10 April 1994. Retrieved 1 August 2025.
Environment The Bundorragha River in the Delphi Valley, feeding into Killary Harbour is one of the most important sites for the Freshwater pearl mussel, which are capable of surviving for up to 140 years.Mannion, Eleanor. Eighth-generation Mayo farmer fights for pearl mussel, Raidió Teilifís Éireann, 22 April 2023. Retrieved 1 August 2025.
Farmed salmon believed to have escaped from Killary Harbour in August 2024 were found to pose significant risk to wild Atlantic salmon population in the Delphi system.O'Sullivan, Kevin. Salmon that escaped from fish farm have been found in three of Ireland's most important angling rivers, The Irish Times, 21 August 2024. Retrieved 1 August 2025.
Media Delphi has been covered in international travel and fishing media.Best Hotels in Ireland, National Geographic, 11 March 2011. Retrieved 1 August 2025. A Man May Fish, by Judge T C Kingsmill Moore, devotes a chapter to Alec Wallace and Delphi. Former owner Peter Mantle wrote the book Double Delphi about his experience owning Delphi Lodge.Evans, Derek. Double Delphi – The Rise and Fall of a Fisherman’s Fantasy by Peter Mantle review, The Irish Times, 13 November 2017. Retrieved 1 August 2025. Heather Richie wrote the book The Delphi Salmon Company about the natural and industrial histories of Irish salmon, and her experience immigrating to Ireland to work with Delphi Lodge.Oakleaf Books, The Delphi Salmon Company. Retrieved 1 December 2025.
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See also List of towns and villages in Ireland