Dervish is an Irish traditional music group from County Sligo, Ireland which has been described by BBC Radio 3 as "an icon of Irish music". They were formed in 1989 by Liam Kelly, Shane Mitchell, Martin McGinley, Brian McDonagh, and Michael Holmes and have been fronted by singer Cathy Jordan since 1991. They represented Ireland in the final of the Eurovision Song Contest 2007, singing a song written by John Waters and Tommy Moran. In 2019 they released an album on the US Rounder Records label called The Great Irish Song Book featuring a selection of classic Irish songs sung by a number of well known singers including Steve Earle, Andrea Corr, Vince Gill, Kate Rusby, Imelda May, Rhiannon Giddens, The Steel Drivers, Brendan Gleeson, Abigail Washburn, and Jamey Johnson. In 2019 they received a lifetime achievement award from the BBC.

Irish traditional music is a genre of folk music that developed in Ireland.