Feadóg Teoranta is a Dublin-based manufacturer of traditional Irish tin whistles, founded in 1978 with the goal of producing an authentic Irish-made whistle that remained affordable for beginners and casual players. The name "Feadóg" is the Irish word for whistle, and the company has positioned itself as one of the few Irish manufacturers of the instrument, with tooling and assembly based in Ireland rather than outsourced overseas.

The core range centers on D whistles, the most common key in Irish traditional music. The flagship Feadóg Brass D is widely sold as an entry-level instrument, while the Feadóg Pro D line offers a heavier barrel for a rounder tone and comes in nickel-plated and black powder-coated finishes. The product line has evolved across several generations, including the Mk.II and Mk.III tunable models developed with input from working musicians. Feadóg also produces whistles in other keys, tutor books, and instructional CDs.

The brand is a fixture in Irish folk and trad sessions and a common starter instrument for students learning Celtic music. Feadóg whistles are distributed internationally through traditional music retailers and gift shops, and the company is based at the Westway Centre in Ballymount, Dublin.

Feadóg has 1 product cataloged on Equipboard, including Whistles.