The Donegal fiddle tradition is one of the distinct fiddle traditions within Irish traditional music. The distinctness of the Donegal tradition developed due to the close relations between County Donegal and Scotland, and the Donegal repertoire and style has influences from Scottish fiddle music. For example, in addition to the ”universally known” standard Irish dance tunes, there is an added volume of Scottish and Nova Scotia tunes played, with even some tunes from Shetland and Orkney. This includes standard tune types such as double jigs, slip jigs, reels, and hornpipes. It has been claimed that Donegal musicians play more slip jigs than any other region of Ireland. This is potentially due to the geographical borders/mountains keeping Donegal's repertoire more locally-known for decades. There is also a prevalence of mazurka playing. Mazurkas are historically mainland-European tunes very similar to a waltz, in its 34 meter, though generally livelier and with more emphasis being placed on the second beat of each measure. Another uniquely Donegal tune is called the barndance, stemming from the Germanic schottische, also similar to the Norwegian reinlander. The barndance is very similar to a hornpipe, but slower than a reel; typically they are played with less of a hornpipe's “swing” and more of the “drive” of a reel.

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