Gerald Barry was born in Clarehill, Clarecastle, County Clare, in the Republic of Ireland. He was educated at St. Flannan's College, Ennis, County Clare. He went on to studied music at University College Dublin, in Amsterdam with Peter Schat, in Cologne with Karlheinz Stockhausen and Mauricio Kagel, and in Vienna with Friedrich Cerha. Barry taught at University College Cork from 1982 to 1986. Growing up in rural Clare, he had little exposure to music except through the radio: "The thing that was the lightning flash for me, in terms of Saint Paul on the road to Damascus, would have been an aria from a Handel opera, from Xerxes maybe, that I heard on the radio. I heard this woman singing this, and bang – my head went. And that was how I discovered music."