Does an Irish Atlantic exist? Indeed, forgetting Ireland when studying the Atlantic world was frequent as the island was easily integrated into English or British history. However, late studies have put forward not only the unavoidable presence of the Irish in the Atlantic world but also their agency, through commercial and ideological exchanges. Green being the color of the Irish, tinting the Atlantic Ocean green was self-evident, and it gave birth to the Green Atlantic. Among academic works, no one has defined this idiom. It is understood as the transatlantic circulation of Irish people, ideologies, and goods. We believe that the Green Atlantic stems from a comparison with the Black Atlantic. This idiom has become trendy these days, however, with publications and conferences using it. The least we can say is that the Green Atlantic was an unwanted Atlantic: whether it was the Irish indentured servants sent to the colonies or the Irish migrants flowing into America as a result of the Great Famine, the Irish were unwanted “others.” They were deemed unreliable and lazy, and they often were compared to the African slaves or the Native Americans as a savage people hard to civilize. Despite the discrimination they suffered as a result of both their religion and their origin, Irish people have left their mark on many aspects of Atlantic societies. Think of the Carrolls, the Kennedys, and most American families that can claim Irish ancestry with pride now.