This Companion brings together leading scholars in the field of Irish studies to explore the significance of twenty-first-century Irish writing and its flourishing popularity worldwide. Focusing on Irish writing published or performed in the 21st-century, this volume explores genres, modes, and styles of writing that are current, relevant, and distinctive in today's classrooms. Examining a host of innovative, key writers, including Sally Rooney, Marion Keyes, Sebastian Barry, Paul Howard, Claire Kilroy, Micheal O'Siadhail, Donal Ryan, Marina Carr, Enda Walsh, Martin McDonagh, Colette Bryce, Leanne Quinn, Sinead Morrissey, Paula Meehan, Ailbhe Ni Ghearbhuigh, and Doireann Ni Ghriofa. This text investigates the socio-cultural and theoretical contexts of their aesthetic achievements and innovations. Furthermore, The Routledge Companion to Twenty-First-Century Irish Writing traces the expansion of Irish writing, offering fresh insight to Irish identities across the boundaries of race, class, and gender. With its distinctive contemporary contexts and comprehensive scope, this multifaceted volume provides the first significant literary history of 21st century Irish literature.