Ojkanje is a tradition of polyphonic folk singing in Croatia characteristic for the regions of the Dalmatian hinterland, Velebit, Lika, Kordun, and Karlovac.

[1] As described in The Harvard Dictionary of Music: "The ojkanje is a particular style of singing melisma with a sharp and prolonged shaking of the voice on the syllables oj or hoj.

Historically, ojkanje is found in the regions of the Dalmatian hinterland, Velebit, Lika, Kordun, and Karlovac, belonging to the Dinaric area, along with several neighbouring micro-regions.

[11] In the beginning of the 20th century, the Croatian Peasant Party began organizing folklore festivals which focused on rural traditions through their charitable wing.

Croatian public television has aired numerous programs on ojkanje groups and reviving the custom among young people.

[22][23] The village of Prigrevica in Sombor, Serbia, and other places in Vojvodina settled by Military Frontiersmen has the musical tradition of Ojkanje.