The role of faith-based schools is increasingly debated within a context of school reform, rights and plurality in multi-ethnic societies. The Catholic schooling system in the Irish Republic (always referred to as Ireland in the text) represents an interesting case internationally because of the extent to which Catholic education is structurally embedded as normative across the education system. Yet, Ireland is in a process of detraditionalisation and wider societal change. Drawing on Bourdieu and Bernstein, and a mixed methodological study of Catholic secondary schools, the article presents a typology of Catholic schooling in transition. This identifies a continuum of Catholicity among the study schools that is mediated by dynamics of social class in an increasingly competitive and diverse system. It is argued this has implications for considering the role of a recontextualised model of Catholic faith schooling, underpinned by principles of social justice in a multicultural and more secularly oriented society.