Youenn Gwernig (10 May 1925 – 29 August 2006; born in Scaër, Douarnenez) was a Breton-American poet, writer and singer.

From 1961, he regularly visited the West Side neighbourhood of New York City and met the Beat Generation writers there.

He became a friend of Jack Kerouac and lived in the Bronx, where he wrote some bilingual poems in Breton and in English about New York or his nostalgy of Brittany in an American big city, as Un dornad plu ("A handful of feathers", 1961) or War ribl ar stêr Harlem ("On the bank of Harlem river", August 1963).

In the 1997's Al Liamm edition of Un dornad plu, Youenn Gwernig explained why he used to write his poems in Breton and to translate them in English : "Meeting with Jack Kerouac in 1965, for instance, was a decisive turn.

In 1990 his album Emañ ar bed va iliz ("The world is my church") was released.