The Pan Celtic Festival (Irish: Féile Pan Cheilteach;[1] Scottish Gaelic: Fèis Pan-Cheilteach;[2] Manx: Feailley Pan-Cheltiagh;[3] Welsh: Gŵyl Ban-Geltaidd;[4] Breton: Gouel Hollgeltiek;[5] Cornish: Gool Keskeltek[6]) is a Celtic-language festival held annually in the week following Easter, in Ireland, since its inauguration in 1971.

It was originally entitled Gŵyl Gerdd Bach (Welsh for "Small Music Festival"), by Con O'Connaill, but later changed to its current name.

In May 1971, the first festival took place in Killarney; and featured performers from Wales (Phyllis and Meredydd Evans), Ireland (Scoil na Toirbhirte), and Brittany (Les Tregerez Group and Alan Stivell).

[4] Meredydd Evans engaged in discussions with the event organiser, Ó Connaill, following the 1971 Festival, and invited him to the National Eisteddfod of Wales.

[7] The term "nation" is used in its original sense to mean a community of people who share a common identity and culture and are identified with a traditional territory.

The event also acts as a national selection process to determine the Breton representative for the annual Pan Celtic Festival.

[10] The group went on to represent Cornwall at the 2015 Pan Celtic Festival, finishing in first place with the song "Hal an Tow" (Flora Day).

[11] The Comórtas Amhrán Náisiúnta (English: National Song Contest) is the Irish selection process to determine the representatives for Ireland at the annual Pan Celtic Festival.

The winner of the contest represents Wales at the annual Pan Celtic Festival held in Ireland and is also awarded a cash prize.