Orthodox Celts is a Serbian band formed in Belgrade in 1992 which plays Irish folk music combined with rock elements. Despite their uncharacteristic genre in their home country, the band has been one of the top acts of the Serbian rock scene since their formation, and has influenced a number of younger Serbian bands, most notably Irish Stew of Sindidun and Tir na n'Og.

The band started their career performing traditional Irish songs and, gradually, introduced more and more of their own material (lyrics mostly written by the band's frontman Aleksandar "Aca Celtic" Petrović, music mostly written by band's violinist Ana Đokić). All their lyrics are in English, but the group has composed some purely instrumental songs as well. The band traditionally celebrates St. Patrick's Day with a large concert in Belgrade.