Swedish folk music is a genre of music based largely on folkloric collection work that began in the early 19th century in Sweden. The primary instrument of Swedish folk music is the fiddle. Another common instrument, unique to Swedish traditions, is the nyckelharpa. Most Swedish instrumental folk music is dance music; the signature music and dance form within Swedish folk music is the polska. Vocal and instrumental traditions in Sweden have tended to share tunes historically, though they have been performed separately. Beginning with the folk music revival of the 1970s, vocalists and instrumentalists have also begun to perform together in folk music ensembles.
The history of Swedish folk music collection began with the formation of an organization called the Gothic Society (Götiska Förbundet) in 1811, shortly after the establishment of Sweden as a modern constitutional monarchy in 1809. The first published transcription of a Swedish folk tune came out in their journal Iduna in 1813. The men of the Gothic Society were primarily interested in collecting the oldest materials they could find among the peasants of the Swedish countryside. Collection in the 19th century largely followed this model; the music was generally arranged for performance by people whose primary background was in art music.