Cian T. McMahon holds a joint appointment in the Department of History and Honors College at the University of Nevada, Las Vegas. He received his Ph.D. from Carnegie Mellon University (2010), his MA from University College Dublin (2002), and his BA from the University of Manitoba (2000).

McMahon has authored or edited three books and over half a dozen scholarly articles on Irish and American immigration history.

The Routledge History of Irish America (2024) gathers over 40 world-class scholars to explore the dynamics that have shaped the Irish experience in America since the seventeenth century.

In The Coffin Ship: Life and Death at Sea during the Great Irish Famine (2021), McMahon uses the emigrants’ own letters and diaries to show how, at every step of the journey—including the treacherous weeks at sea—migrants created new threads in the worldwide web of the Irish diaspora.

In The Global Dimensions of Irish Identity: Race, Nation, and the Popular Press, 1840-1880 (2015), he argues that the international dispersal of millions of people during and after the Great Famine radically altered how the Irish thought about nations and nationalism.

His articles have appeared in a range of journals including the Journal of American Ethnic History, Irish Historical Studies and the American Historical Review.

At UNLV, McMahon’s transatlantic interests allow him to teach a range of courses in Irish, European, and American history. He also teaches seminars of his own design including “Great Migrations in Modern Human History” and “Soccer and the Making of the Modern World.”